Mortuary + Viscera Seer + Bontu's Monument + Gwenom, Remorseless

Mortuary

Viscera Seer

Bontu's Monument

Gwenom, Remorseless

How it works

1. Activate Viscera Seer by sacrificing a creature with mana value 1 or less.
2. When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library.
3. Resolve the Viscera Seer ability.
4. Cast the creature from the top of your library by paying 1 life.
5. Bontu's Monument triggers, causing you to gain 1 life and each opponent to lose 1 life.
6. Repeat.

This loop transforms a humble sacrifice outlet into a lethal life-drain engine by leveraging your library as a recurring hand. You sacrifice a cheap creature to Viscera Seer, which immediately triggers Mortuary to place that creature right back on top of your library. From there, Gwenom, Remorseless grants you the ability to cast that creature straight from the top of your library by paying life instead of its mana cost. Finally, Bontu's Monument steps in to completely offset that life payment while draining your opponents out of the game with every single repetition.