Furrion Terror (it is killed if damaged by ice or if frozen)
Paladin of Unaxio (ice damage to friendly hero and ally is reduced by 1)
Popsickle (has +1 attack for each frozen ally in play)
Icebound Denizen (Damage to frozen friendly allies is reduced by 1. Damage to frozen opposing allies is increased by 1. 0SE: Target opposing ally and Icebound Denizen are frozen until the start of your next turn.)
Rampaging Yeti (When Rampaging Yeti deals combat damage to a frozen ally, that ally is killed)