Chilling Aura. A creature that starts its turn within 10 feet of the fury must succeed on a DC 20 Constitution saving throw or take 11 (2d10) cold damage.
Magic Resistance. The fury has advantage on saving throws against spells and other magical effects.
Multiattack. The fury makes two Fist or Rock attacks.
Fist. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit:17 (2d8 + 8) bludgeoning damage plus 10 (3d6) cold damage, or 17 (5d6) cold damage if the target took damage from the fury's Chilling Aura since the end of the fury's last turn.
Rock. Ranged Weapon Attack: +13 to hit, range 60/240 ft., one target. Hit:30 (4d10 + 8) bludgeoning damage.
Charge. The fury can move up to its speed toward an enemy it can see.
Frost giants who struggle to rise in their ordning, along with those who reject Annam and his children, sometimes turn to the worship of the demon lord Kostchtchie. In the myths of these giants, Kostchtchie was once a frost giant of such tremendous might that he slew a demon lord in single combat, claimed its Abyssal realm for himself, and now waits for other frost giants to join him in conquering the rest of the Abyss.