Alex, Mercer

Mutate {b}{r}{g}
Menace,
Whenever this creature mutates, Sry.1 draw 1.
then put a +1/+1 on Alex, then you may have it
fight target creature with equal or less power.
Whenever a creature dies by combat damage
from Alex, put the creature underneath this card.
"You could say I'm... symptomatic."