Vorinclex, Hungering Machine

Whenever a creature an opponent controls with a
virus counter on it dies, put a -1/-1 counter onto
each creature that player controls that shares a
color with it.
Whenever a creature you control with a virus
counter on it dies, put a +1/+1 counter onto each creature you control that shares a color with it.
"The multiverse is filled with predators that just need
to become perfect."