Diabolical Vats

{2},{t}: Exile target creature you control. Return it to the battlefield at the end of the turn with an experiment counter.

During your upkeep, flip a coin for each creature you control with an experiment counter. If the result is heads,
put three +1/+1 on it. If the result is tails, put two -1/-1 counters on, and tap it.

If a creature with an experiment counter dies, exile it instead.
A grotesque study of cloning and hybridization