Flying Octobot 

Artifact Creature — Robot Villain
Flying Whenever another Villain you control enters, put a +1/+1 counter on this creature. This ability triggers only once each turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL