Mortuary + Cruel Celebrant + Mogg Fanatic + Bolas's Citadel

Mortuary

Cruel Celebrant

Mogg Fanatic

Bolas's Citadel

How it works

1. Activate Mogg Fanatic by sacrificing it.
2. When Mogg Fanatic dies, Mortuary and Cruel Celebrant trigger.
3. Resolve the Mortuary trigger, putting Mogg Fanatic from your graveyard onto the top of your library.
4. Resolve the Cruel Celebrant 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 loop turns Mogg Fanatic into an endlessly recycling projectile by leveraging Mortuary, which catches the goblin as it dies and immediately tucks it back onto the top of your library. Bolas's Citadel makes casting the creature from the very top of your library effortless by substituting its mana cost for a small payment of life, which is easily offset and capitalized upon by Cruel Celebrant draining your opponents and padding your life total with every single cycle.