Mortuary + Amareth, the Lustrous + Chamber Sentry

Mortuary

Amareth, the Lustrous

Chamber Sentry

How it works

1. Cast Chamber Sentry by paying 0.
2. Chamber Sentry enters the battlefield and dies as a state-based action due to having zero toughness.
3. Mortuary and Amareth trigger.
4. Resolve the Mortuary trigger, putting Chamber Sentry on top of your library from your graveyard.
5. Resolve the Amareth trigger, causing you to reveal Chamber Sentry from the top of your library and put it into your hand.
6. Repeat.

This clever loop turns the zero-cost casting of Chamber Sentry into a self-sustaining engine by exploiting the interaction between its toughness and your permanent spells. Because it enters with zero toughness for zero mana, Chamber Sentry immediately heads to the graveyard as a state-based action, which triggers Mortuary to conveniently tuck it back onto the top of your library. Meanwhile, Amareth, the Lustrous watches over the battlefield, eagerly triggering whenever that same artifact creature enters so you can reveal it on top of your library and slide it straight back into your hand. By endlessly recasting Chamber Sentry for free, you rack up an infinite storm count alongside limitless creature entries, leaves, and demises.