Scorched Rusalka, Mikaeus, the Unhallowed, Luminous Broodmoth, and Gleaming Barrier

Prerequisites

• Scorched Rusalka on the battlefield
• Mikaeus, the Unhallowed on the battlefield
• Luminous Broodmoth on the battlefield
• Gleaming Barrier on the battlefield
• available

Steps

1. Activate Scorched Rusalka by paying and sacrificing Gleaming Barrier
2. Gleaming Barrier dies, triggering itself, it's undying ability and Luminous Broodmoth
3. Resolve the first Gleaming Barrier trigger, creating a Treasure token
4. Resolve the Luminous Broodmoth trigger, returning Gleaming Barrier from your graveyard to the battlefield with a flying counter on it
5. Resolve the second Gleaming Barrier trigger, failing to return it to the battlefield
6. Resolve the Scorched Rusalka ability from step 1, dealing 1 damage to target player or planeswalker
7. Activate the Treasure token by tapping and sacrificing it, adding
8. Activate Scorched Rusalka by paying and sacrificing Gleaming Barrier
9. Gleaming Barrier dies, triggering itself and it's undying ability
10. Resolve the first Gleaming Barrier trigger, creating a Treasure token
11. Resolve the second Gleaming Barrier trigger, returning it from your graveyard to the battlefield with a +1/+1 counter on it
12. Resolve the Scorched Rusalka ability from step 8, dealing 1 damage to target player or planeswalker
13. Activate the Treasure token by tapping and sacrificing it, adding
14. Activate Scorched Rusalka by paying and sacrificing Gleaming Barrier
15. Gleaming Barrier dies, triggering itself and Luminous Broodmoth
16. Resolve the first Gleaming Barrier trigger, creating a Treasure token
17. Resolve the Luminous Broodmoth trigger, returning Gleaming Barrier from your graveyard to the battlefield with a flying counter on it
18. Repeat from step 6

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers