Act 3: Baldur's Gate & The Chosen — The Honour Mode Endgame

The Honour Mode Endgame. Race to level 12, Sorcerous Sundries Vault, Foundry, Iron Throne, three Chosen, an Archdevil, an Undead Dragon, and the Elder Brain. No margin for error.

I — The Race to Level 12: Baldur's Gate in Pillage Mode

Act 3 is a trap. The city of Baldur's Gate overflows with quests and exploration, but also with impossible fights if you are not at maximum level. Every Act 3 boss has Honour Mode mechanics that assume a party at the power ceiling.

CARDINAL RULE: DO NOT TRIGGER any boss fight before your entire party is Level 12. Not 11. Not 11 and a half. Twelve. Level 12 unlocks level 6 Spell Slots (Globe of Invulnerability), the 3rd Extra Attack (Fighter), and final feats. Without them, you are under-equipped for every boss in this act.

Peaceful XP Route (Lower City → Upper City)

The Lower City is a treasure trove of combat-free XP. Explore everything before triggering a single hostile scenario.

Rivington is Act 3's welcome zone. Talk to every NPC, resolve conflicts through diplomacy. The Tiefling refugee quest (Persuasion DC 12) yields 75 XP without combat. Akabi's circus offers 200 XP + legendary loot (see below). Rivington merchants sell Counterspell Scrolls and Greater Healing Potions — buy everything.

The Lower City is the densest XP zone in the game. Baldur's Gate Cemetery contains necromantic quests (~3,000 XP). The guilds (Thieves' Guild via Mol, the Counting House via the Zhentarim) offer entire narrative arcs resolvable without combat. Every tavern has at least one NPC with a quest. Expect ~12,000 XP from exploration and dialogue alone.

Total calculation: Rivington (8,000) + Lower City (12,000) + Upper City (6,000) + Undercity (4,000) = ~30,000 XP available without major combat. The Level 11 → 12 threshold requires ~14,000 XP per character. With the XP accumulated from Acts 1 and 2, this is more than sufficient.

🛐 The Double Miracle (Light Cleric): Descend into the secret basement of the Tabernacle (watch out for curse traps!). Open your deity's chest to steal the Amulet of the Devout. It increases your spell DC by +2 AND gives you an extra Channel Divinity charge. You can cast Radiance of the Dawn twice per combat!

Raiding the Sorcerous Sundries Vault

The Sorcerous Sundries Vault (Ramazith's Tower) contains the two most powerful Act 3 items for a spellcaster: the Markoheshkir and the Robe of the Weave.

The Door Puzzle — Complete Solution

The Vault is protected by a system of magically locked doors. Each room is a trap or puzzle. Here is the optimal route without combat:

Room 1 — The Lava Room: The floor is covered in lava. Use Misty Step to teleport each character onto the raised platforms. Alternative: the Fly spell (level 3) on the whole party. Do NOT walk through the lava — 3d10 fire/turn, even with Fire Resistance that is 16.5 average damage/turn.

Room 2 — The Lever Puzzle: Four levers control four doors. The correct sequence is: Lever 3 → Lever 1 → Lever 4 → Lever 2. An incorrect lever summons a Lava Golem (180 HP). In Honour Mode, the fight is doable but consumes resources. Follow the sequence.

Room 3 — The Guardian Chamber: An Elemental Guardian stands watch before the main vault. If you have a character with Stealth +9 or more, sneak past it (Guardian's passive Perception: 16). Otherwise, use Invisibility and steal the vault contents without engaging combat.

The Vault: Contains the Markoheshkir (legendary +3 staff) and the Robe of the Weave (+1 spell DC, +1 spell attack, permanent Mage Armour).

The Markoheshkir is the best staff in the game. Its Karsus Element lets you choose an elemental damage type per Long Rest (Fire, Cold, Lightning, Thunder, Necrotic, or Force), and it grants Globe of Invulnerability for free — a spell normally level 6 that consumes a precious slot. Against Raphael and Ansur, this Globe is the difference between a wipe and a victory.

The Karsus + Lightning synergy: If you set the Karsus Element to Lightning, all spells channelled through the staff deal Lightning damage. Against the Steel Watch Titan (Lightning vulnerable), this automatically doubles all damage. Plan your Element based on the next boss.

🔮 Absolute Power (Sorcadin): Buy the Cloak of the Weave from Lorroakan's projection, and steal the Book of Karsus from the vault to unlock the ultimate scrolls.

⚡ The Ultimate Staff (Storm Sorcerer): In Ramazith's Tower (lower level), use the invisibility button to pass through the magical barriers and retrieve Markoheshkir. This is the absolute legendary staff. Use its Kereska ability to bind to Lightning: free spells, resistance, and increased damage!

Endgame Equipment — Final Acquisitions

Before engaging bosses, finalise your equipment. Every slot counts.

The Nyrulna is a legendary +3 trident that automatically returns after a throw and generates an AoE thunder explosion on impact. It is hidden behind the Wheel of Fortune mini-game of the djinn Akabi at the Travelling Circus. Tip: the djinn cheats. Use Pickpocket (Stealth DC 15) to steal his loaded die before playing, and the wheel always lands on the jackpot.

The Legacy of the Masters (+2 attack and damage with weapons) is purchasable from Dammon only if he survived Acts 1 and 2. If Dammon is dead, these gloves are permanently lost — this is why protecting Dammon is listed in the exit checklists of previous acts.

The Ring of Regeneration (1d4 HP/turn) stacks with the Helm of Balduran (2 HP/turn) for a total of 2 + 2.5 = 4.5 HP/turn on average. On a tank with 100 HP, that is 4.5% of their HP restored each turn without spending resources.

🔱 The Definitive Weapon (Throwzerker): Steal Akabi the Djinn's ring to win the jackpot and be teleported to the jungle. At the end of the path, open the chest to obtain Nyrulna. This legendary trident deals area thunder damage on every throw and returns to your hand. You have become a god of destruction.

💍 THE CENTREPIECE (Bard): In Akabi's jungle, DO NOT LEAVE RIGHT AWAY. Search the skeleton near the ledge to find the Band of the Mystic Scoundrel. This ring lets you cast illusion/enchantment spells as a Bonus Action after a weapon attack. Paired with the Helmet of Arcane Acuity, you can attack 4 times then paralyse any boss with 100% success in the same turn. The game is over.

II — Dismantling Gortash's Empire

Gortash controls Baldur's Gate through two pillars of power: the Steel Watch Foundry (his golem army) and the Iron Throne (his underwater prison). Destroying both bastions BEFORE confronting Gortash himself is the optimal strategy — it eliminates his reinforcements and unlocks crucial allies.

A — The Steel Watch Foundry

The Foundry is the factory producing the Steel Watchers — the metal golems patrolling Baldur's Gate. Destroying it is a major story objective, but the Foundry boss is the Steel Watch Titan — a giant golem with 300 HP that can crush a character in a single turn.

Detailed Strategy — Steel Watch Titan

The Titan has 300 HP, AC 20, and a Lightning vulnerability. This is your primary lever.

Lightning DPS Calculation:

• Lightning Bolt (level 3): 8d6 = avg. 28, ×2 vulnerability = 56 damage
• Lightning Bolt upcast (level 5): 10d6 = avg. 35, ×2 = 70 damage
• Call Lightning (level 3, Concentration, 3d10/turn): avg. 16.5, ×2 = 33/turn
• Markoheshkir attack with Karsus Lightning: 1d8+3 bludgeoning + bonus Lightning damage, ×2 on the bonus

With two Lightning-specialised casters: Turn 1 = 2× upcast Lightning Bolt = 140 damage. Turn 2 = Call Lightning + Lightning Bolt = 103 damage. Total in 2 turns: 243/300 HP. The Titan is nearly dead by Turn 3.

MELEE TRAP: The Titan's Crushing Grip grapples a character (STR Saving Throw DC 18) and deals 2d8+8 bludgeoning automatically each turn. A grappled martial loses their turn AND takes damage. The solution: Freedom of Movement (grapple immunity) on your tank BEFORE combat, or Misty Step as a Reaction (teleportation breaks grapples).

B — The Iron Throne (Underwater Prison)

The Iron Throne is Gortash's underwater prison. Duke Ravengard is held prisoner there. Rescuing him is mandatory for Wyll's narrative path and unlocks a powerful ally for the final battle.

5-TURN TIMER. As soon as you enter the Iron Throne, a 5-turn countdown triggers before the structure collapses. Every second counts. No optional combat, no exploration, no hesitation.

Mandatory Preparation — BEFORE Diving

Haste is non-negotiable here. The spell doubles movement and grants an extra Action. A character under Haste covers 18m/turn instead of 9m — the difference between reaching the Duke's cell on Turn 2 and reaching it on Turn 4 (too late).

Misty Step (18m teleportation as a Bonus Action) passes through locked doors and walls. The character under Haste + Misty Step can reach the Duke's cell in a single turn: Movement (18m Hasted) → Misty Step (18m) → Dash Action (18m) = 54m total movement. The prison is ~45m long. More than enough.

Turn-by-Turn Rotation

CRITICAL FAILSAFE: If the Duke is targeted by guards during the retreat, Sanctuary (Bonus Action, level 1) protects him entirely — guards must succeed on a WIS Saving Throw to target him, otherwise they choose another target. This is your absolute safety net.

III — The Chosen: Gortash & Orin (Emergency Matrices)

Recommended Combat Order

The order in which you face the Chosen matters. Each fight tests a different skill, and the difficulty is calibrated as an escalation.

BOSS: Gortash, Chosen of Bane (250 HP)

Gortash is the "cleanest" boss in Act 3 — a single enemy, a single deadly mechanic. He is the perfect test to validate that your party is ready for what follows.

The Deadly Mechanic — Tyrannical Brand

Tyrannical Brand is the only thing that can kill you here. Gortash brands a character on Turn 1, and after 2 turns, the curse explodes for ~110 force damage. This is a one-shot on 95% of characters — only a Bear Totem Barbarian with 130+ HP would survive, and barely.

Calculation: A typical level 12 character has 80-100 HP (Martial with CON 16 = 12d10+36 = avg. 102 HP). 110 force damage = guaranteed death on any character with less than 111 HP. Force damage bypasses most resistances — there is NO Force Resistance in the base game.

The solution is straightforward: Remove Curse purges the Brand instantly. Cast it as soon as the debuff appears — not next turn, not when it is "convenient". Immediately. The spell is level 3, range Touch — the Cleric must be adjacent to the branded character. Position your Cleric accordingly before the fight.

COMMON FATAL ERROR: Forgetting to prepare Remove Curse on the Cleric because this spell is rarely useful in the rest of the game. Check your prepared spells. Now.

Turn 1 Execution — Hold + Burst

Once the Brand is purged, exploit Gortash's great weakness: he is a humanoid. Hold Person paralyses him, guaranteeing automatic critical hits in melee as long as the paralysis holds.

Turn 1 burst kill calculation:

1. Hold Person → Gortash paralysed (WIS Saving Throw +2 vs DC 17 = 75% paralysis with Helmet of Arcane Acuity active)
2. Paladin → Attack 1: 2d6+5 slashing (auto crit) + level 4 Divine Smite (10d8 radiant crit) = 2×(7+5) + 2×(45) = 24 + 90 = 114 damage
3. Paladin → Attack 2: same calculation with level 3 Smite = ~95 damage
4. Turn 1 total from a single Paladin = ~209 damage. Gortash has 250 HP. A second attacker finishes the job.

BOSS: Orin the Red, Chosen of Bhaal (200 HP → Slayer Form)

Orin is a cognitive trap. Her Phase 1 is trivial — a few poisoned daggers, minor cultists. The real fight begins when she transforms into the Slayer at 50% HP. And that is where runs die.

Phase 1 — Human Orin (200 → 100 HP)

Phase 1 is a standard fight. Orin has 4 dagger attacks (+12, 1d4+5 piercing + 2d6 poison × 4), but her Poison immunity makes her cultists more dangerous than she is. Focus DPS on Orin to bring her to 100 HP as quickly as possible. Do not waste any level 5+ Spell Slots here — you will need them in Phase 2.

Phase 2 — The "Unstoppable" Mechanic (12 Invulnerability Charges)

At 100 HP, Orin transforms into the Bhaal Slayer. She immediately activates Unstoppable: each attack she receives is reduced to 1 damage and consumes 1 charge. She has 12 charges.

The mathematical problem:

• If you attack normally: 12 charges ÷ 2 attacks/character/turn ÷ 4 characters = 1.5 turns just to exhaust the charges. But during this time, her Slayer Claws (2d8+6 × 3 = avg. 45 damage/turn) shred your party.
• In reality, with misses (AC 17), it is closer to 2-3 turns for the charges. Unacceptable in Honour Mode.

THE SOLUTION: Magic Missile. Each missile of Magic Missile counts as a separate attack. Each missile consumes one Unstoppable charge. And Magic Missile never misses — no Attack Roll, auto-hit.

Optimal calculation:

• Magic Missile level 5 = 7 missiles = 7 charges burned in one Action
• Magic Missile level 6 = 8 missiles = 8 charges burned in one Action
• Two castings (2 casters, or 1 caster + Scroll): 7 + 7 = 14 charges burned → all 12 Unstoppable charges are exhausted with margin
• Total time: 1 turn. Compare to 2-3 turns with normal attacks.

ADVANCED TIP: If only one character has Magic Missile, use a Magic Missile Scroll (level 5, purchasable from Lower City merchants ~400 GP) on a second character. Any class can use a scroll if they succeed on an Arcana check (DC 15). With INT 14+, that is 55% success rate.

🩸 The Death Aura (Assassin): Become an Unholy Assassin of Bhaal (accept Valeria's murder) to access the merchant Echo of Abazigal. Buy from him the Bhaalist Armor. It makes all enemies within 2 metres VULNERABLE to piercing damage (damage ×2). With your daggers and point-blank bow, you will one-shot entire bosses.

IV — The Deadly Optional Bosses

These two fights are the hardest in the game. They are optional — but the rewards are so powerful that they transform the final fight against the Elder Brain from a nightmare into a precision exercise.

OPTIONAL BOSS: Raphael, Archdevil (666 HP)

The hardest fight in the game. 666 HP, Counterspell as a Reaction (+8 to the check), massive fire AoE, and 4 Soul Pillars that make him nearly invincible. Only attempt this fight if you want the Helldusk Armour (21 AC, -2 reduction to all damage, Burning immunity).

Rule 1 — Soul Pillars (ABSOLUTE PRIORITY)

4 Soul Pillars permanently strengthen Raphael: +2 AC, 20 HP/turn regeneration, resistance to all damage. As long as a single pillar stands, Raphael is unbeatable. Each pillar has ~40 HP — individually fragile, but there are 4 scattered across the arena.

Turn 1 Strategy: Split your party. Two characters on the north pillars, two on the south pillars. Each Fireball (8d6 = avg. 28) can hit 2 pillars if you aim between them. Two Fireballs = 4 pillars destroyed in one turn. If you only have one AoE caster, use Lightning Bolt (line that passes through multiple pillars) as a complement.

Rule 2 — ABSOLUTE BAN on Radiant Damage Against Minions

DEADLY TRAP: Raphael's demonic minions possess a doubled fire damage reflection. If you use Divine Smite (Radiant) on a minion, the demon converts your damage to fire and reflects double. A level 3 Smite = 4d8 radiant → 4d8 × 2 = 8d8 fire reflected = avg. 36 damage to YOUR attacker.

Inform the entire team BEFORE the fight. A Paladin who reflexively Smites a minion can kill themselves in one hit.

Rule 3 — Globe of Invulnerability (Mandatory Phase 2)

In Phase 2, Raphael transforms into an Archdevil and unleashes his Infernal Breath (10d8 fire, DEX Saving Throw DC 20 = avg. 45 damage). Against a grouped party, this is a potential wipe in a single turn.

The Globe of Invulnerability nullifies any spell/ability of level 5 or less within its 3m zone. Infernal Breath is a level 5 spell — it is completely neutralised. Group your characters inside the Globe during Breath phases, exit to strike when Raphael is on cooldown.

The Markoheshkir grants the Globe for free — you do not even have to consume a level 6 Spell Slot. This is the reason the Sorcerous Sundries Vault is listed before Raphael in this act.

🥊 The Fists of God (Monk): Save Hope and kill Raphael. She will give you the Gloves of Soul Catching. These gloves add 1d10 force damage to your unarmed attacks and heal you for 10 HP per hit. You are now invincible in 1v1.

🛡️ The Helldusk Armour (Lockadin): By killing Raphael, you obtain the Helldusk Armour. Not only does it offer 21 AC, but you are considered proficient even if you lack the proficiency (though you have it as a Paladin). This is your final armour.

OPTIONAL BOSS: Ansur, the Undead Dragon (400 HP)

Ansur is a bronze dragon turned undead, lurking beneath the Wyrmway below Wyrm's Rock. The fight is brutal but rewards with the two best defensive items in the game: Balduran's Giantslayer and the Helm of Balduran.

The Central Mechanic — Stormheart Nova

Ansur possesses a unique ability: Stormheart Nova. When he takes flight and begins channelling, he is preparing to unleash a massive AoE of 10d8 lightning damage (avg. 45 damage, DEX Saving Throw DC 18 for half) that covers nearly the entire arena.

This is NOT a spell. Counterspell does NOT work against Stormheart Nova. It is an innate ability — no verbal component, no interruptible targeting.

You have 1 turn of warning. When Ansur takes flight and begins to glow, the Nova arrives next turn. This turn is your survival window.

Nova Survival Strategy

The Globe of Invulnerability nullifies the Nova if it is classified as a level 5 or lower ability. In BG3, Stormheart Nova is treated as a level 5 spell — the Globe neutralises it entirely. Group your 4 characters inside the Globe during the channelling turn, then exit to strike.

If you do not have the Globe: Lightning Resistance (spell, potion, or equipment) reduces the 45 damage to ~22.5. Combine with a Dash behind the furthest pillars. The pillars provide partial cover (+5 to DEX Saving Throw = 70-80% chance of halving = ~11 final damage with resistance + cover + successful Save).

ANSUR'S IMMUNITIES: Lightning (obviously), Poison, Necrotic. Vulnerability: Radiant. Unlike Raphael's minions, radiant damage is your best friend here. Divine Smite is doubled. The Blood of Lathander continues to blind undead — including Ansur.

Radiant burst calculation:

• Level 3 Divine Smite + Undead bonus: 4d8 + 1d8 = 5d8 radiant = avg. 22.5, ×2 vulnerability = 45 per Smite
• 2 attacks + 2 Smites in one turn = 90 radiant damage from a single Paladin
• Ansur has 400 HP. In 4-5 turns of concentrated radiant DPS, he falls.

Balduran's Giantslayer (doubles Strength modifier on damage) and the Helm of Balduran (regenerates 2 HP/turn + anti-crit) make your tank nearly immortal for the remaining fights. These two items alone justify the risk of the Ansur fight.

🗡️ The Giantslayer (Lockadin): Defeat the undead dragon Ansur to retrieve Balduran's Giantslayer. It is the best two-handed weapon in the game. If you use Cloud Giant Strength Elixirs (Strength 27), this weapon's damage reaches absurd heights.

V — The Point of No Return

After defeating the Chosen and retrieving the Netherstones, you can face the Elder Brain. This decision is IRREVERSIBLE. Make sure you have completed EVERYTHING you wanted to do in Baldur's Gate.

Mandatory prepared spells checklist:

• Haste on at least 1 caster
• Counterspell on at least 1 caster
• Freedom of Movement on at least 1 caster (anti-Domination)
• Globe of Invulnerability via Markoheshkir or level 6 slot

VI — The Elder Brain — Final Battle (Netherbrain — 450 HP)

This is the last fight of your Honour Mode run. Everything you have built — the builds, the equipment, the failsafes — converges here. The Elder Brain is not the hardest boss in the game (Raphael is worse), but its exclusive Honour Mode mechanic demands absolute tactical discipline that is tested nowhere else.

RED ALERT — EXCLUSIVE HONOUR MODE MECHANIC

RETRIBUTIVE IMMUNITY: At the end of each round, the Elder Brain becomes totally immune to ALL damage types it suffered during that round, for the following round. If you mix Lightning + Radiant + Slashing on Turn 1, the Brain is immune to all three on Turn 2. A single character who attacks with the wrong damage type on the wrong turn ruins the entire rotation.

Why this is devastating: Imagine your Paladin strikes with a fire-enchanted sword on Turn 1 (the "Magical" Turn). The sword deals Slashing + Fire. The Brain becomes immune to Slashing AND Fire on Turn 2. On Turn 2 (the "Martial" Turn), your martials can no longer deal Slashing damage. Your rotation is broken.

The Damage Segmentation Protocol

This is the most important strategy in the game. Every character must know exactly which turn they attack and which turn they simply buff/heal.

Turn 1 — Magical Damage ONLY

On Turn 1, only your spellcasters attack. Allowed damage types:

• Lightning: Lightning Bolt, Call Lightning
• Cold: Cone of Cold, Ray of Frost
• Force: Eldritch Blast, Magic Missile

Your martials on Turn 1: They do NOT attack. They position, consume their Strength Elixirs, cast Shield of Faith, and prepare Haste on Turn 2 attackers.

Turn 2 — Martial Damage ONLY

On Turn 2, your martials attack. Allowed damage types:

• Radiant: Divine Smite
• Slashing: Weapon attacks (sword, axe)
• Bludgeoning: Weapon attacks (mace, hammer)

Your casters on Turn 2: They deal no damage. They heal, buff (Haste), or use non-offensive utility spells.

Turn 3+ — Alternate the Cycle

The cycle repeats: Turn 3 = Magical, Turn 4 = Martial, etc. Each turn, the Brain loses the previous turn's immunities and gains those of the current turn. Perfect segmentation = 0 wasted turns.

THE MOST COMMON FATAL ERROR

REMOVE ALL ELEMENTAL ENCHANTMENTS FROM YOUR WEAPONS BEFORE THIS FIGHT.

A character with an elemental weapon enchantment (e.g. +1d6 fire on a sword, Everburn Blade with its passive 1d4 fire) who attacks on the "wrong" turn adds the Fire type to the Brain's immunity list. Yes, even 1 fire damage is enough. The immunity is binary — 1 fire damage = total Fire immunity.

FORBIDDEN weapons on the Martial Turn:

• Everburn Blade (passive fire)
• Any weapon with Fire, Cold, Lightning, or Acid enchantment
• Nyrulna (thunder explosion = Thunder damage = Thunder immunity next turn)

ALLOWED weapons on the Martial Turn:

• Balduran's Giantslayer (pure Slashing + Force bonus)
• +3 weapons without elemental enchantment
• Divine Smite (Radiant — allowed on the Martial Turn only)

Phase 2 — Below 50% HP: Retributive Damage

Below 225 HP, the Brain deals 2d8 psychic (avg. 9) to every melee attacker, no Saving Throw. This is NOT a Reaction — it triggers on every hit. A martial with 3 attacks per turn takes 3 × 9 = 27 automatic psychic damage per turn just from attacking.

Solution: Switch entirely to ranged attacks.

• Eldritch Blast (Force, ranged, 3 rays at level 11+)
• Magic Missile (Force, auto-hit)
• Bows and crossbows for martials (Slashing/Piercing)
• Weapon throws (Nyrulna returns automatically — perfect here, but beware of Thunder on the wrong turn)

The Brain uses Domination (WIS Saving Throw DC 20) as a Legendary Action in Phase 2. A dominated character attacks your allies for 1 turn. A dominated Paladin with Great Weapon Master active can one-shot your healer in a single strike (2d6+15 × 2 = avg. 44 damage).

Freedom of Movement before the fight immunises the most dangerous character (your main DPS) to Domination. For the others, stack Wisdom Saving Throw bonuses: Paladin 6 Aura of Protection (+CHA to Saves), Cloak of Protection (+1 Saves), Ring of Protection (+1 Saves).

Final Execution

Phase 2 rotation reminder:

• Odd turns (1, 3, 5...): Ranged magical damage (Force, Lightning, Cold) — casters only
• Even turns (2, 4, 6...): Ranged physical damage (Piercing via bows, Radiant via ranged spells) — martials only
• Nobody attacks in melee after the 50% HP threshold

With perfect rotation, every turn deals non-immunised damage. The Brain falls in 5-7 turns with a well-equipped party.

Epilogue

Congratulations, Commander. If you are reading these lines and your save file displays "Victory — Honour Mode", you have accomplished one of the most demanding challenges in modern RPGs. Every build planned, every failsafe prepared, every damage type segmented — all of it converged toward this moment. The Race to Level 12 gave you the power. The Sorcerous Sundries Vault gave you the tools. The discipline of the rotation gave you the victory. May the dice ever be in your favour.