Felhide Spiritbinder + Intruder Alarm + Priest of Urabrask + Lightning Prowess

Felhide Spiritbinder

Intruder Alarm

Priest of Urabrask

Lightning Prowess

How it works

1. Activate Felhide Spiritbinder by tapping it, dealing 1 damage to any target.
2. Cast Priest of Urabrask by paying 2.
3. Priest of Urabrask enters the battlefield, triggering itself and Intruder Alarm.
4. Resolve the Priest of Urabrask trigger, adding .
5. Resolve the Intruder Alarm trigger, untapping all creatures.
6. Felhide Spiritbinder triggers, holding priority, activate it by tapping it, dealing damage equal to its power to any target.
7. Resolve the Felhide Spiritbinder trigger, causing you to pay 1 to create a token copy of Priest of Urabrask with haste.
8. Repeat from step 3.

This ingenious loop hinges on Intruder Alarm, whose global static trigger turns every creature entering the battlefield into an untap switch for your entire board. When you cast Priest of Urabrask, its entry generates a burst of red mana and simultaneously trips Intruder Alarm to untap Felhide Spiritbinder. You can then tap Felhide Spiritbinder—granted its tapping and damage-dealing capabilities by Lightning Prowess—to trigger its *Inspired* ability upon untapping, paying {1}{R} to churn out another token copy of Priest of Urabrask and perpetuating an endless cycle of mana, damage, and hasty tokens.