Mortuary + Mogg Fanatic + Bolas's Citadel + Venerated Stormsinger

Mortuary

Mogg Fanatic

Bolas's Citadel

Venerated Stormsinger

How it works

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

This cunning loop turns the humble Mogg Fanatic into an endless engine of destruction by leveraging the passive advantage of Bolas's Citadel to cast spells directly from the top of your library at the cost of your life total instead of mana. Each time you sacrifice the Fanatic, Mortuary ensures it never truly stays in the graveyard, instantly placing it back on top of your library to keep the Citadel fueled. Meanwhile, Venerated Stormsinger watches the carnage unfold, converting each death into a steady stream of life gain and life loss that easily outpaces the minor life payments demanded by the Citadel.