5e SRD:Ice Devil
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Large fiend (devil), lawful evil
Saving Throws Dex +7, Con +9, Wis +7, Cha +9
Devil's Sight. Magical darkness doesn't impede the devil's darkvision.
Magic Resistance. The devil has advantage on saving throws against spells and other magical effects.
Multiattack. The devil makes three attacks: one with its bite, one with its claws, and one with its tail.
Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) piercing damage plus 10 (3d6) cold damage.
Claws. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 10 (2d4 + 5) slashing damage plus 10 (3d6) cold damage.
Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage plus 10 (3d6) cold damage.
Wall of Ice (Recharge 6). The devil magically forms an opaque wall of ice on a solid surface it can see within 60 feet of it. The wall is 1 foot thick and up to 30 feet long and 10 feet high, or it's a hemispherical dome up to 20 feet in diameter.
Found most commonly on the cold layers of Stygia and Cania, ice devils serve as commanders of the infernal armies of the Nine Hells, tormenting lesser devils as an outlet for their anger and resentment. Coveting the power of their pit fiend superiors, ice devils work ceaselessly toward promotion, slaughtering the enemies of the Nine Hells and claiming as many souls as they can for their archdevil masters.