Mortuary + Bile Urchin + Bolas's Citadel + Bastion of Remembrance

Mortuary

Bile Urchin

Bolas's Citadel

Bastion of Remembrance

How it works

1. Activate Bile Urchin by sacrificing it.
2. When Bile Urchin dies, Mortuary and Bastion of Remembrance trigger.
3. Resolve the Mortuary trigger, putting Bile Urchin from your graveyard onto the top of your library.
4. Resolve the Bastion of Remembrance trigger, causing you to gain 1 life and each opponent to lose 1 life.
5. Resolve the Bile Urchin ability.
6. Cast Bile Urchin from the top of your library by paying 1 life.
7. Repeat.

This clever loop turns a humble goblin into a lethal win condition by manipulating the top of your library. With Bolas's Citadel providing the crucial alternative casting cost of life instead of mana, you can recast Bile Urchin straight from the library the moment Mortuary places it there. Meanwhile, Bastion of Remembrance serves as a vital amplifier, turning every single iteration of this cycle into a net-neutral or positive life exchange that keeps your life total safe while draining the table dry.