Frost Walker 
Creature — Elemental
When this creature becomes the target of a spell or ability, sacrifice it.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Elemental
When this creature becomes the target of a spell or ability, sacrifice it.