Mortuary + Blasting Station + Memnite + Bolas's Citadel

Mortuary

Blasting Station

Memnite

Bolas's Citadel

How it works

1. Activate Blasting Station by tapping it and sacrificing Memnite
2. When Memnite dies, Mortuary triggers, putting Memnite from your graveyard onto the top of your library.
3. Resolve the Blasting Station ability.
4. Cast Memnite from the top of your library by paying 0 life.
5. When Memnite enters, Blasting Station triggers, untapping Blasting Station.
6. Repeat.

This loop turns the zero-mana cost of Memnite into a relentless engine of destruction, fueled entirely by the life-substitution effect of Bolas's Citadel to cast it straight from the top of your library. Every time you sacrifice Memnite to Blasting Station, Mortuary steps in to instantly rescue it from the graveyard and place it right back on top of your library where Bolas's Citadel can grab it again. Meanwhile, Blasting Station's untap trigger resets the station with every re-entry, allowing you to recycle the same creature infinitely to machine-gun down the table.