Nested Ghoul + Intruder Alarm + Burning Anger

Nested Ghoul

Intruder Alarm

Burning Anger

How it works

1. Give Nested Ghoul indestructible, if needed.
2. Activate Nested Ghoul by tapping it, dealing damage equal to its power to itself.
3. Nested Ghoul triggers, creating a 2/2 Phyrexian Zombie creature token.
4. When the Phyrexian Zombie enters the battlefield, Intruder Alarm triggers, untapping all creatures.
5. Repeat from step 2.

By enchanting Nested Ghoul with Burning Anger, you transform it into a self-contained engine that deals damage directly to itself. Because Nested Ghoul triggers whenever damage is dealt to it, every self-inflicted blast yields a fresh 2/2 Phyrexian Zombie token. That new arrival immediately awakens Intruder Alarm, whose global untap effect clears the activation cost so Nested Ghoul can tap and repeat the cycle endlessly.