Skeleton Ship + Intruder Alarm + Flayer of the Hatebound + Carrion Feeder

Skeleton Ship

Intruder Alarm

Flayer of the Hatebound

Carrion Feeder

How it works

1. Activate Carrion Feeder by sacrificing Flayer of the Hatebound.
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. Resolve the Carrion Feeder ability from step 1, putting a +1/+1 counter on it.
7. Activate Skeleton Ship by tapping it, putting a -1/-1 counter on Flayer of the Hatebound.
8. Repeat.

This clever engine uses Carrion Feeder as the sacrificial outlet to send Flayer of the Hatebound to the graveyard, where its undying ability immediately brings it back with a +1/+1 counter. Because Flayer of the Hatebound enters the battlefield from the graveyard, it triggers both its own damage-dealing ability and Intruder Alarm, which untaps all creatures—including Skeleton Ship—so you can tap it to place a -1/-1 counter on Flayer of the Hatebound. This -1/-1 counter neatly cancels out the creature's +1/+1 counter, allowing the cycle to repeat indefinitely to incinerate any target and grow Carrion Feeder infinitely.