Phase 1 - cryo has no abilities.

Phase 2 - cryo will gain the ability to spawn minions, they deal 25 damage.

phase 3 - cryo will gain the ability to spawn an ice storm in the sky that deals 40 ice/sharp damage.

phase 4 - cryo will enhance the previous ability by being able to spawn in red explosive crystals, they deal 150 damage, ouch 

phase 5 - cryo will gain the ability to spawn ice spikes in 3 waves, each spike dealing 500 damage and instantly killing everyone with every type of armor :(