Zelus, the Altraz Golem

: Non-Creature permanents with Frostbite counters are also treated as 1/1 Creatures.
+3: Place a Frostbite counter on X target permanents where X is the number of snow permanents you control.
-7: Destroy all Snow Permanents. You get mana of any color combination equal to the number of cards destroyed this way. They're Snow mana.