Scorched Rusalka + Shambling Ghast + Mikaeus, the Unhallowed + Soul Diviner + Intruder Alarm

Scorched Rusalka

Shambling Ghast

Mikaeus, the Unhallowed

Soul Diviner

Intruder Alarm

How it works

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