Mortuary + Blasting Station + Bolas's Citadel + Fear of Lost Teeth

Mortuary

Blasting Station

Bolas's Citadel

Fear of Lost Teeth

How it works

1. Activate Blasting Station by tapping it and sacrificing Fear of Lost Teeth.
2. When Fear of Lost Teeth dies, it and Mortuary triggers.
3. Resolve the Mortuary trigger, putting Fear of Lost Teeth from your graveyard onto the top of your library.
4. Resolve the Fear of Lost Teeth trigger, causing you to gain 1 life and dealing 1 damage to any target.
5. Resolve the Blasting Station ability.
6. Cast Fear of Lost Teeth from the top of your library by paying 1 life due to Bolas's Citadel.
7. When Fear of Lost Teeth enters, Blasting Station triggers, untapping Blasting Station.
8. Repeat.

This clever loop turns the cheap cost of Fear of Lost Teeth into a devastating engine by cycling it directly from the battlefield to the top of your library via Mortuary whenever it is sacrificed. Bolas's Citadel makes the actual recasting effortless, bypassing conventional mana costs by trading your life total instead—a cost easily offset by the life gain built right into Fear of Lost Teeth's demise. Meanwhile, Blasting Station acts as the ultimate catalyst, both providing the initial sacrifice outlet and constantly untapping itself from the creature's reentry to repeat the carnage until your opponents are entirely whittled away.