Mortuary + Altar of Dementia + Crookshank Kobolds + Gwenom, Remorseless

Mortuary

Altar of Dementia

Crookshank Kobolds

Gwenom, Remorseless

How it works

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

This clever loop centers around Gwenom, Remorseless, whose attack trigger allows you to play cards directly from the top of your library while bypassing their mana costs by paying life instead. Because Crookshank Kobolds has a mana value of zero, you can cast it off the top of your library for zero life every single time it returns. Mortuary ensures that whenever you use Altar of Dementia to sacrifice the Kobolds, the creature goes straight back to the top of your library rather than staying in the graveyard, perfectly feeding Gwenom's top-deck casting condition. By repeating this cycle, Altar of Dementia mills your opponents out infinitely while generating an unbounded storm count and endless sacrifice triggers.