- Great Hammer Collision
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Lore
The shriveled Old Demon King is now like a clump of burnt ash, but he is the last living witness of the Chaos of Izalith.
— Description of the Soul of the Old Demon King
General Information
An old and dying demon king, surrounded by the corpses of ancient demons.
This fight is optional.
Location
- At the back of the cavern in the lake, near the Demon Ruins Bonfire.
Summons
- Great Swamp Cuculus, just in front of the boss fog.
- Successful fight spawns Cornyx's Set and Spotted Whip in Undead Settlement.
- Knight Slayer Tsorig, in the bonfire room to the right of the boss fog.
- Must be defeated in Catacombs of Carthus.
Item Drops
Moveset
- Swing: Swings his club.
- Flame Breath: Spews Fire in a cone in front of him right-to-left.
- Flame Wave: Knocks the ground several times before creating a circle of flame that homes in.
- Takes reduced damage while casting.
Phase Transition: <70% HP, Old Demon King will stomp forward and gain additional flame.
- Summon Meteors: Waves club to create meteors that eventually home and land on the target.
- Takes reduced damage while casting.
Phase Transition: <20% HP, collapses and creates a fiery shockwave after five seconds.
- Collapse: Attempts to swing, but collapses further, potentially still dealing damage.
Strategies
Notes
- Demon enemy, meaning they take 20% bonus Damage from Black Knight Sword, Greatsword, Greataxe, and Glaive.
- Dealing 14.44% of their maximum HP in damage to their head will open them up for a Critical attack.
Bugs
- Players may get dragged by or stuck inside the boss's great hammer.
- Phase 3 may rarely cancel into the meteor attack of Phase 2 before reverting back.
Trivia
- His arena is filled with dead demons from the first Dark Souls, such as Taurus Demons, Capra Demons, and even a Centipede Demon.
See Also
Gallery

Music
Videos
- DARK SOULS III デーモンの老王
- Old Demon King - NG+7, SL1. Black Knight Sword and Heavy Crossbow.
- SL1 NG+7, +0 weapons no rings/buffs, Old Demon King