Mortuary + Moldervine Reclamation + Bile Urchin + Gwenom, Remorseless

Mortuary

Moldervine Reclamation

Bile Urchin

Gwenom, Remorseless

How it works

1. Activate Bile Urchin by sacrificing it.
2. When Bile Urchin dies, Mortuary and Moldervine Reclamation trigger.
3. Resolve the Mortuary trigger, putting Bile Urchin from your graveyard onto the top of your library.
4. Resolve the Moldervine Reclamation trigger, causing you to gain 1 life and draw a card.
5. Resolve the Bile Urchin ability.
6. Cast Bile Urchin from the top of your library by paying 1 life.
7. Repeat.

This delightfully wicked loop turns a humble little Phyrexian rat into an endless engine of attrition. When you sacrifice Bile Urchin to drain your opponent, Mortuary immediately catches the dying creature and slips it right back onto the top of your library, while Moldervine Reclamation rewards the death by drawing you a card and padding your life total. Meanwhile, Gwenom, Remorseless provides the crucial static permission to cast that exact same Bile Urchin straight off the top of your library—swapping its mana cost for a tiny payment of life that your Moldervine Reclamation gains right back.