Arc Runner 
Creature — Elemental Ox
Haste (This creature can attack and 
as soon as it comes under your control.)
At the beginning of the end step, sacrifice this creature.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL