Mortuary + Realmwalker + Hangarback Walker

Mortuary

Realmwalker

Hangarback Walker

How it works

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

By leveraging Mortuary to redirect creatures straight from the graveyard back to your library, this loop transforms a lethal state-based action into a continuous cycle. Realmwalker provides the crucial top-deck access and creature casting permissions by treating every creature type as the chosen one, allowing Hangarback Walker to be repeatedly cast for zero mana straight off the library. Because Hangarback Walker enters with zero toughness and instantly hits the graveyard, it triggers Mortuary endlessly, generating infinite entry, exit, and death triggers without ever needing to stay on the battlefield.