Defeat Ketheric Thorm and the Apostle of Myrkul in baldurs gate 3. Free Aylin to damage Ketheric; Apostle of Myrkul takes half damage from necrotic, cold, and poison.
- Ensure Wyll has been helped with his mission from Mizora, otherwise he will be killed.
- 1Jump down the tunnel from the rooftop into the Mind Flayer Colony.
- 2Head east and destroy the sinews blocking your path.
- 3At the crossroads, take the eastern path (left fork) and pass through the fleshy door near the skeletal banner and green brazier.
- 4Locate the Neutral Apparatus in the next room, walk onto its platform, and interact with it to descend to a lower area.
- 5Proceed through the next fleshy door. You will receive a warning about Wyll's fate if his mission from Mizora was not completed.
- 6After a lengthy cutscene (a non-interactive cinematic the game plays automatically) (a non-interactive cinematic the game plays automatically), you will be able to interact with and face Ketheric Thorm.
Boss Fight: Ketheric Thorm Phase 1
Ketheric Thorm has an armor class of 22. Before you can damage him, you must free Aylin from her prison in the top-right corner of the room. He is impervious to damage until Aylin is freed. Use the first round of combat to deal with additional enemies like Necromites and the Mind Flayer. The Mind Flayer can cast Dominate Person, which can turn Aylin against you. Counterspelling this spell is possible if you have a spellcaster with the spell and available spell slots. Ketheric uses Deadly Orders to command his Necromite minions, and he summons one or two new Necromites each turn. Cleric spells like Sanctuary, Death Ward, or Feign Death can help keep allies alive. Once Aylin is freed, keep her healthy; she has high movement speed and strong attacks, though she is immortal and will not get a full turn when downed. The Cleric's Guardian of Faith spell is effective, as its Strike of the Guardian deals 20 Radiant damage. Other large area-of-effect spells like Wall of Fire or Fireball are also useful. Keeping Aylin alive and using powerful spells will help sustain your party against Ketheric and his minions.
After depleting Ketheric's health bar, another cutscene will trigger.
Boss Fight: Apostle of Myrkul Phase 2
Ketheric Thorm transforms into the Apostle of Myrkul. This form has 225 Health on Balanced mode and an armor class of 19. It does not move from the center of the arena. Avoid dealing necrotic, cold, and poison damage, as the Apostle takes half damage from these types. Close combat party members will suffer from Myrkul’s Presence, which inflicts Bone Chill, preventing healing and dealing Necrotic damage when nearby.
- Focus on freeing Aylin as quickly as possible in Phase 1, as Ketheric is invulnerable until she is freed.
- Prioritize eliminating the Mind Flayer in Phase 1 to prevent it from casting Dominate Person on Aylin.
- Utilize area-of-effect spells like Guardian of Faith, Wall of Fire, or Fireball to damage multiple enemies, especially Ketheric and his Necromites.
- Keep Aylin alive and healthy in Phase 1, as she is a powerful ally once freed.
- In Phase 2, avoid necrotic, cold, and poison damage against the Apostle of Myrkul.
- Consider ranged attacks or spells in Phase 2 to mitigate the effects of Myrkul’s Presence on melee characters.
Defeating Ketheric Thorm and the Apostle of Myrkul progresses the story and yields experience and loot.
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