Mortuary + Blasting Station + Bolas's Citadel + Tarpan

Mortuary

Blasting Station

Bolas's Citadel

Tarpan

How it works

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

This ingenious loop transforms a humble, low-impact creature into an unstoppable engine of destruction by turning life into a renewable resource. While Bolas's Citadel allows you to continuously replay your top card by paying life instead of mana, Mortuary ensures that sacrificed creatures never truly leave your library, seamlessly placing them right back on top where the Citadel can grab them again. Meanwhile, Tarpan provides the crucial life buffer by granting you 1 life upon death to offset the life payment of the Citadel, and Blasting Station acts as both the ultimate sacrifice outlet and the win condition, repeatedly untapping itself upon entry to blast away your opponents one damage at a time.