Life at Stake 
Instant
You and target creature's controller each secretly choose a number 0 or greater. Then, reveal the chosen numbers. If your number was highest or tied for the highest, exile that creature. Each player who chose the highest number loses that much life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL