Tundra Fumarole 
Snow Sorcery
Tundra Fumarole deals 4 damage to target creature or planeswalker. Add 
for each 
spent to cast this spell. Until end of turn, you don't lose this mana as steps and phases end. ( is mana from a snow source.)
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL