Nested Ghoul + Pandemonium

Nested Ghoul

Pandemonium

How it works

1. Give Nested Ghoul indestructible by any method.
2. Deal damage to Nested Ghoul.
3. Nested Ghoul triggers, creating a 2/2 Phyrexian Zombie creature token.
4. The Phyrexian Zombie enters the battlefield, triggering Pandemonium, causing the Phyrexian Zombie to deal damage equal to its power to Nested Ghoul.
5. Repeat from step 3.

This loop turns self-sustaining damage into a localized battlefield catastrophe by leveraging Pandemonium to constantly trigger new entries. Whenever the Phyrexian Zombie token hits the board, Pandemonium forces it to deal damage back to the source—in this case, looping right into your Nested Ghoul. Because Nested Ghoul is safely protected by indestructible, every single point of damage it takes triggers its ability to spawn *another* Phyrexian Zombie, keeping the automated slaughterhouse running indefinitely.