Mortuary + Experimental Frenzy + Shifting Wall

Mortuary

Experimental Frenzy

Shifting Wall

How it works

1. Cast Shifting Wall 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 ingenious loop turns Shifting Wall into an endless, self-replenishing engine by casting it for zero mana with *X* equal to zero over and over again. As the creature immediately perishes upon entry due to having zero toughness, Mortuary catches it on the way to the graveyard and dutifully stacks it right back onto your library. Meanwhile, Experimental Frenzy provides the crucial top-deck vision and casting permission needed to keep playing that exact same Shifting Wall directly off the library without ever needing a hand, generating an infinite storm count and endless creature triggers.