Vault 87: Forced Evolution (Fallout)

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