Scorched Rusalka + Shambling Ghast + Luminous Broodmoth + Soul Diviner + Intruder Alarm

Scorched Rusalka

Shambling Ghast

Luminous Broodmoth

Soul Diviner

Intruder Alarm

How it works

1. Activate Scorched Rusalka by paying and sacrificing Shambling Ghast.
2. Shambling Ghast and Luminous Broodmoth triggers.
3. Resolve the Shambling Ghast triggers, creating a treasure token.
4. Resolve the Luminous Broodmoth triggers, returning Shambling Ghast to the battlefield with a flying counter on it.
5. Intruder Alarm triggers, untapping all creatures.
6. Resolve the Sorched Rusalka trigger, dealing 1 damage to any target.
7. Activate the treasure token by tapping and sacrificing it, adding .
8. Activate Soul Diviner by tapping it, removing a flying counter from Shambling Ghast.
9. Repeat.

This clever setup turns Shambling Ghast into a self-sustaining engine of doom, fueled by the relentless untapping power of Intruder Alarm every time a creature enters the battlefield. You sacrifice the Ghast to Scorched Rusalka to chip away at your opponent's life total, which triggers Luminous Broodmoth to bring the Ghast right back—complete with a flying counter—while the Ghast's own death trigger creates a Treasure token for the necessary red mana. Since Luminous Broodmoth only cares about creatures *without* flying, Soul Diviner steps in as the crucial pressure valve, tapping to safely strip away that newly acquired flying counter so the entire loop can immediately begin anew.