Jeweled Torque 
Artifact
As this artifact enters, choose a color.
Whenever a player casts a spell of the chosen color, you may pay . If you do, you gain 2 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL