Mortuary + Blasting Station + Bolas's Citadel + Crookshank Kobolds

Mortuary

Blasting Station

Bolas's Citadel

Crookshank Kobolds

How it works

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

This clever loop transforms free-casting into an endless cycle of destruction by leveraging Bolas's Citadel to play cards directly from the top of your library using life instead of mana. You initiate the sequence by sacrificing Crookshank Kobolds to Blasting Station, dealing a point of damage and sending the tiny creature to the graveyard. From there, Mortuary instantly catches it on the way down and tucks it right back onto the top of your library where Bolas's Citadel can see it again. Finally, the creature's return triggers Blasting Station to untap itself, allowing you to recast Crookshank Kobolds for zero life and repeat the entire process indefinitely until your opponents are reduced to ash.