Incisor Steed 
Artifact Creature — Phyrexian Horse
Vigilance Corrupted Metalcraft — As long as you control three or more artifacts and an opponent has three or more poison counters, Incisor Steed gets +3/+0.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL