Cryogeddon

You may cast Cryogeddon as though it had flash
if you spend only mana from snow sources to
cast it.
Target creature and/or planeswalker becomes a
snow artifact with "{t}, Sacrifice this artifact: Add {c}" and loses all other card types and abilities.
Overload {3}{u}{u} (You may cast this spell for its
overload cost. If you do, change "target" in its text to
"each.")