The Nemesis

When Nemesis enters, create two 2/2 black Zombie creature tokens with Toxic 2 named T-virus Zombie.

At the beginning of your upkeep, create a T-virus
Zombie if you control less than two zombie tokens.

{2}: Target player gets 2 poison tokens. If they have
poison counters, they loose 2 life instead.

An unstoppable force built for one task...destroy
S.T.A.R.S.