Vault 87: Forced Evolution

Enchantment — Saga • Mana cost: {3}{G}{U} • Fallout • Rare

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Gain control of target non-Mutant creature for as long as you control this Saga.
II — Put a +1/+1 counter on target creature you control. It becomes a Mutant in addition to its other types.
III — Draw cards equal to the greatest power among Mutants you control.

Illustrated by Nicholas Gregory.