K'rrik, Son of Yawgmoth + Doomsday + Aphotic Wisps + Cruel Bargain + Sacrifice + Mikaeus, the Unhallowed + Walking Ballista + Viscera Seer

K'rrik, Son of Yawgmoth

Doomsday

Aphotic Wisps

Cruel Bargain

Sacrifice

Mikaeus, the Unhallowed

Walking Ballista

Viscera Seer

How it works

1. Cast Doomsday by paying 6 life, searching your library and graveyard for Cruel Bargain, Sacrifice, Mikaeus, Walking Ballista, and Viscera Seer, exiling all other cards from your graveyard and library, and then placing the remaining cards on top of your library in the order previously listed and losing half your life, rounded up.
2. Cast Aphotic Wisps by paying 2 life, targeting K'rrik, causing you to draw a card.
3. Cast Cruel Bargain by paying 6 life, causing you to draw four life and losing half your life, rounded up.
4. Cast Sacrifice by paying 2 life and sacrificing K'rrik, adding .
5. Cast Mikaeus by paying 3.
6. Cast Viscera Seer by paying .
7. Cast Walking Ballista by paying 0.
8. Activate Viscera Seer by sacrificing Walking Ballista.
9. Walking Ballista undying ability triggers, returning it to the battlefield and putting +1/+1 counter on it.
10. Activate Walking Ballista by removing +1/+1 counter, dealing 1 damage to any target.
11. Repeat from step 8.