Legendary Resistance (3/Day). If Yggen fails a saving throw, it can choose to succeed instead.

Immutable Form. Yggen is immune to any effect that would alter its form.

Unmovable. Yggen cannot be moved.

Magic Resistance. Yggen has advantage on saving throws against spells and other magical effects.

Rejuvenation. When Yggen drops to 0 hit points, the DM takes over.

Unusual Nature. Yggen doesn’t require air, food, drink, or sleep.

Universal Conduit.

Yggen does not use traditional spell slots. Instead, it draws from a pool of 37 Strain Points. It knows every spell from all spell lists (Wizard and Warlock)

• Casting a Spell: When Yggen casts a spell of 1st level or higher, he incurs Strain equal to the spell's level.

• Cantrips: Cantrips do not cost Strain and can be cast at will.

Spellcasting. Yggen is an 18th-level spellcaster. His spellcasting ability is Charisma (spell save DC 22, +14 to hit with spell attacks).

Multiattack. Yggen makes three attacks.

Lash (Dagger). Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 16 [rollable](2d10 + 5)