Mortuary + Bolas's Citadel + Crookshank Kobolds + Phantom Train

Mortuary

Bolas's Citadel

Crookshank Kobolds

Phantom Train

How it works

1. Activate Phantom Train by 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 Phantom Train ability.
4. Cast Crookshank Kobolds from the top of your library by paying 0 life.
5. Repeat.

This clever engine transforms zero-cost creatures into an endless loop by leveraging Mortuary, which neatly recycles any creature that hits your graveyard straight back to the top of your library. From that vantage point, Bolas's Citadel allows you to play that top card directly while bypassing its mana cost entirely by paying life instead—which costs a mere 0 life for a tiny creature. To feed this cycle, Phantom Train acts as the permanent sacrifice outlet that bins your creatures on demand while growing itself with +1/+1 counters, letting you continuously re-cast and re-sacrifice Crookshank Kobolds to generate infinite storm count, creature triggers, and monstrous growth.