Skeleton Ship + Intruder Alarm + Flayer of the Hatebound + Ashnod's Altar

Skeleton Ship

Intruder Alarm

Flayer of the Hatebound

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Flayer of the Hatebound, adding CC.
2. Flayer of the Hatebound dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
3. Flayer of the Hatebound enters the battlefield, triggering itself and Intruder Alarm.
4. Resolve the Flayer of the Hatebound trigger, dealing damage equal to its power to any target.
5. Resolve the Intruder Alarm trigger, untapping all creatures.
6. Activate Skeleton Ship by tapping it, putting a -1/-1 counter on Flayer of the Hatebound.
7. Repeat.

This loop transforms Ashnod's Altar and Flayer of the Hatebound into a self-sustaining engine of sacrifice and resurrection, utilizing Flayer of the Hatebound's undying ability to bring itself back with a +1/+1 counter each time it hits the graveyard. To clear away those counters and keep the loop going, Skeleton Ship steps in as the precision tool, tapping to place a -1/-1 counter that neatly neutralizes the creature's +1/+1 counter via state-based actions. Meanwhile, Intruder Alarm watches every single resurrection happen, untapping your entire board of creatures—including Skeleton Ship—so you can repeat the process indefinitely while generating infinite colorless mana and infinite damage.