Mortuary + Wild Cantor + Bolas's Citadel + Susurian Voidborn

Mortuary

Wild Cantor

Bolas's Citadel

Susurian Voidborn

How it works

1. Activate Wild Cantor by sacrificing it.
2. When Wild Cantor dies, Mortuary and Susurian Voidborn trigger.
3. Resolve the Mortuary trigger, putting Wild Cantor from your graveyard onto the top of your library.
4. Resolve the Susurian Voidborn trigger, causing you to gain 1 life and target opponent to lose 1 life.
5. Cast Wild Cantor from the top of your library by paying 1 life.
6. Repeat.

This elegant loop harnesses Bolas's Citadel to bypass traditional mana costs entirely, letting you cast Wild Cantor straight from the top of your library for just a single point of life instead of its usual mana value. Each time you sacrifice Wild Cantor for mana, Mortuary gently catches it on its way to the graveyard and places it right back on top of your library to repeat the process. Meanwhile, Susurian Voidborn watches the endless procession of sacrifices to effortlessly drain your opponents' life totals while padding your own life buffer to fuel the Citadel.