Blizzard Ape

Flyby. The blizzard ape doesn't provoke opportunity attacks when it flies out of an enemy's reach.

Flyby Grapple. The blizzard ape has advantage on any Grapple attacks they make after moving at least 30 ft. this round.

Flying Target Practice. One blizzard ape may drop a grappled creature. The other monster may move up to their movement speed as a reaction and make an attack on the plummeting creature. If the attack hits, it is automatically critical.

Vengeance. The remaining blizzard ape, enraged by the loss of their mate, has advantage on all attacks made this round and gains an extra attack.

Menace. At the beginning of the blizzard ape turn, if it has half HP or less, it lets out a menacing roar. Attacks rolls are made with disadvantage against blizzard ape unless there are more than one creature is within 5 feet of the creature and that isn't incapacitated.

Multiattack. The ape makes two Fist attacks or one Snowball and one Icicle

Fist. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: (2d10 + 4) bludgeoning damage.

Snowball. Ranged Weapon Attack: +7 to hit, range 50/100 ft., one target. Hit: (3d6 + 4) bludgeoning damage.

Icicle. Ranged Weapon Attack: +7 to hit, range 5/100 ft., one target. Hit: (1d12+4) piercing damage. Also targets speed becomes 0 until target uses an action to removes the Icicle.

Cold Breath (Recharge 6): Exhales cold in a 5 by 30 foot line. Each creature in the path must make a DC 14 Constitution saving throw, taking (3d6) cold damage on a failed save.