Necrotic Ooze + Phyrexian Devourer + Deathbringer Thoctar

Necrotic Ooze

Phyrexian Devourer

Deathbringer Thoctar

How it works

1. Activate Phyrexian Devourer's ability repeatedly to exile your entire library, adding a number of counter to it equal to the mana value of the exiled cards.
2. Use Deathbringer Thoctar's ability to remove +1/+1 counters to deal 1 damage to any target until your opponent are dead.