Avalanche

The Caster will raise their hand into the air causing a freezing energy to radiate in a 30ft sphere around the caster. All creatures who are not immune to Magical Ice must make a Dexterity save or be frozen. The caster then closes their hand causing any frozen creatures to take 5d10 Cold Damage.

Creatures who pass the save lose 15ft of movement speed and take only 2d4 Cold damage.