Sun Droplet 
Artifact
Whenever you're dealt damage, put that many charge counters on this artifact. At the beginning of each upkeep, you may remove a charge counter from this artifact. If you do, you gain 1 life.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL