Mortuary + Wild Cantor + Bolas's Citadel + Moonlit Wake

Mortuary

Wild Cantor

Bolas's Citadel

Moonlit Wake

How it works

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

This ingenious loop uses Bolas's Citadel to bypass traditional mana costs by letting you cast Wild Cantor straight from the top of your library for a mere 1 life instead of its normal mana value. Every time you sacrifice Wild Cantor for mana, Mortuary gently guides it right back to the top of your library so the Citadel can play it again. Meanwhile, Moonlit Wake neatly offsets the life payment by granting you 1 life with every single death, creating a self-sustaining engine of infinite colored mana, life, and storm count.