Mana Screw 
Artifact
: Flip a coin. If you win the flip, add 
. Activate only as an instant.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL
Artifact
: Flip a coin. If you win the flip, add . Activate only as an instant.