Angelheart Vial 
Artifact
Whenever you're dealt damage, you may put that many charge counters on this artifact.
, 
, Remove four charge counters from this artifact: You gain 2 life and draw a card.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL