Mortuary + Blasting Station + Aetherflux Reservoir + Bolas's Citadel

Mortuary

Blasting Station

Aetherflux Reservoir

Bolas's Citadel

How it works

1. Activate Blasting Station by tapping it and sacrificing a creature
2. When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library.
3. Resolve the Blasting Station ability.
4. Cast the creature from the top of your library by paying X life, where X is the creature's mana value.
5. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
6. When the creature enters, Blasting Station triggers, untapping Blasting Station.
7. Repeat.

This ingenious loop uses Bolas's Citadel to continually cast a creature straight from the top of your library by paying life instead of mana. When you sacrifice that creature to Blasting Station, Mortuary steps in to instantly recycle it right back to the top of your library, ensuring you never run out of ammo. Every iteration triggers Aetherflux Reservoir to steadily offset the life you spent casting the creature, while Blasting Station's untap ability resets the station to repeat the cycle infinitely.