Zero, Perfected Hunter

Deathtouch, Reach, Ward {1} sacrifice a creature

When Zero enters, create Perfected Toxin, a legendary artifact token with "Whenever a nontoken creature an opponent controls dies, note one of its creature types. You cannot note the same creature type multiple times."
Creatures your opponent control get-1/-1 for each creature type that it shares with noted creature types on Perfected Toxin.
Creatures you control get +1/+1 for each creature type that it shares with noted creature types on Perfected Tox