To kill Grym in Baldur's Gate 3, the most effective strategy involves using the environment and exploiting Grym's "Superheated" vulnerability:
Key Steps to Defeat Grym
- Activate the Adamantine Forge and flood the area with lava by turning the Lava Valve. This causes Grym to become "Superheated," removing its damage immunity and making it vulnerable to bludgeoning damage, which deals double damage to it
- Lure Grym to the Crucible platform in the middle of the forge. Grym targets the last character who attacked it, so use a ranged character to attack last and guide Grym to stand under the Forge Hammer
- Trigger the Forge Hammer by pulling the Forge Lever when Grym is positioned under it. The hammer deals massive bludgeoning damage and knocks Grym prone, significantly reducing its health in one hit. Repeating this process twice usually kills Grym on Explorer and Balanced difficulties
- Use ranged attacks from higher ground or safe platforms to avoid damage from Grym and the environment. Keep Grym moving through lava to maintain the Superheated debuff and maximize damage output
- Manage the minions (magma mephits) that spawn during the fight—they are relatively weak and can be handled with normal attacks
Additional Tips
- Position one character near the Lava Valve to control the lava flow and another near the Forge Lever to activate the hammer, or use ranged attacks (arrows or spells) to activate these from a distance
- Use speed buffs like Haste or Speed Potions on melee characters to maximize attacks during the window when Grym is vulnerable
- If you prefer a safer, longer fight, keep characters on separate platforms and disable opportunity attacks to avoid unnecessary damage
By combining these tactics—flooding the forge, luring Grym under the hammer, and exploiting its vulnerability to bludgeoning damage—you can efficiently defeat Grym and complete the Adamantine Forge quest
