Mortuary + Realmwalker + Shifting Wall

Mortuary

Realmwalker

Shifting Wall

How it works

1. Cast Shifting Wall either from your hand or from the top of your library by paying 0.
2. Shifting Wall enters the battlefield and dies as a state-based action due to having zero toughness.
3. Mortuary triggers, putting Shifting Wall on top of your library from your graveyard.
4. Repeat.

This clever loop turns the zero-cost artifact creature Shifting Wall into a self-sustaining engine by abusing its natural fragility. Because Shifting Wall enters with zero toughness when cast for free, it immediately dies to state-based actions, triggering Mortuary to seamlessly recycle it right back to the top of your library. Meanwhile, Realmwalker provides the crucial top-deck casting permission and Changeling utility—allowing you to continually play Shifting Wall off the top of your library regardless of what creature type you initially name.