Evolution Vat 
Artifact
, 
: Tap target creature and put a +1/+1 counter on it. Until end of turn, that creature gains "
: Double the number of +1/+1 counters on this creature."
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL