Level 93 powerful demon lord capable of a confusing gaze and summoning bison and hell bovine
- Hit dice: 52
- Move: 24"
- Armor class: -8
- Magic cancellation: 20 (94%)
- Magic resistance: 70%
- Alignment: Chaotic
- Size: Huge
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Number of attacks: 5
- Butt, physical 8d6
- Ram, physical 8d10
- Gaze, confusion
- Summoning, demon (success 20%)
- Summoning, bison (success 30%)
Attribute scores
St:24 Dx:9 Co:24 In:14 Wi:10 Ch:10
Innate abilities
- Full fire resistance
- Poison resistance
- See invisible
- Stun resistance
Classifications
- Flying
- Handless
- Animal
- Thick hide
- Telekinetically operating
- Demon
- Infravision
- Speaking
- Prince
Notable
- Vulnerable to silver weapons
- Vulnerable to blessed weapons
- Eschews cursed items
- Eschews silver items
- Eschews blessed items
- Does not eat
Corpse properties
- Poisonous
Picture

Treasure
Yacc is normally generated wearing an artifact ring as a nose ring. If none of the following rings have been generated in the game yet, he has an equal 1/3 chance to generate with The Ring of Three Wishes, The Serpent Ring of Set, or The Ring of Conflict. If all three have already been generated, there is a chance he will generate with The Ruling Ring of Yendor instead.
In his lair, Yacc guards a chest containing the following loot:
- A 50% chance of a wand of disintegration, otherwise a magic lamp
- A 50% chance of a potion of full healing
- A 50% chance of a potion of gain level
- A 50% chance of a potion of gain ability
- An uncursed weapon from the treasure class