Trigon of Corruption 
Artifact
This artifact enters with three charge counters on it.
, 
: Put a charge counter on this artifact.
, , Remove a charge counter from this artifact: Put a -1/-1 counter on target creature.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL