Arcane Leak. When the Adranach is reduced to half its hit point maximum (85 hit points), its mithral mask cracks and its arcane form begins to waver, creating a field of unstable magic around it. Any creature that starts its turn within 10 feet of the Adranach or enters that area for the first time on a turn takes 10 (3d6) radiant damage. Additionally, if a creature casts a spell within this area, it must make a DC14 ability check using its spellcasting ability. On a failure, the spell backfires, consuming the spell slot and dealing 3 (1d6) force damage to the caster for each level of the spell slot that was consumed.

Immutable Form. The adranach is immune to any spell or effect that would alter its form.

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

Magic Weapons. The adranach's weapon attacks are magical.

Powerful Build. The adranach counts as one size larger when determining its carrying capacity and the weight it can push, drag, or lift.

Multiattack. The Adranach makes two attacks with its claws.

Claws. Melee Weapon Attack: +11 to hit, one target, reach 5 ft. Hit: 32 (4d12+6) slashing damage.

Force Bolts (Recharge 5-6). The adranach targets up to 4 creatures it can see within 60 feet of it. Each target must succeed on a DC18 Dexterity saving throw or take 28 (8d6) force damage.