Evolution Vat{3}
Artifact
{3}, {T}: Tap target creature and put a +1/+1 counter on it. Until end of turn, that creature gains "{2}{G}{U}: Double the number of +1/+1 counters on this creature."
The vats are self-contained worlds, bubbling and churning with unnatural speed, boiling down eons of change into moments.
Artist: John Avon