Multiattack

The giant makes two Icy Greataxe or Ice Boulder attacks.

Icy Greataxe

_Melee Weapon Attack:_ +9 to hit, reach 10 ft., one target. _Hit:_ 25 (3d12+6) slashing damage plus 4 (1d8) cold damage.

Ice Boulder

_Ranged Weapon Attack:_ +6 to hit, range 60/240 ft., one target. _Hit:_ 18 (3d10+2) bludgeoning damage plus 9 (2d8) cold damage.

Avalanche (Recharge 5-6)

The frost giant sends out a wave of snow in a 30-foot cone. Each creature in that area must make a DC 16 DEX save. On a failure, a creature takes 14 (4d6) bludgeoning damage and 18 (4d8) cold damage and is buried. On a success, a creature takes half the damage and isn't buried. A buried creature is restrained and unable to breathe or stand up. A creature, including the buried creature, can take its action to free the buried creature by succeeding on a DC 16 STR check.