Comments, feedback, and suggestions welcome.
Tier 1: Ice Bolt (T, Instant, direct ice damage), Frostbite (T, Unit Enchantment, halves movement points)
Tier 2: Nodebreak (S, Instant, destroys siphon), Cold Pulse (S, Instant, direct damage)
Tier 3: Dehydrate (T, Instant, small irresistible AoE damage)
Tier 4: Arctic Chill (T, Instant, ice damage to all)
Tier 5: Lower Resistance (T, Instant, lowers SR for a few turns)
Tier 6: Ice Storm (T, Instant, cold+bludgeoning AoE)
Tier 7: Shackles of Ice (S, Unit Enchantment, target stack cannot move until successful save)
Tier 8: Maelstrom (S, Instant, large cold AoE damage)