Chthonian Nightmare, Priest of Urabrask, and Greedy Freebooter

Prerequisites

• Chthonian Nightmare on the battlefield
• Priest of Urabrask in the graveyard
• Greedy Freebooter on the battlefield
• You have at least three energy counters

Steps

1. Activate Chthonian Nightmare by paying , sacrificing Greedy Freebooter and returning Chthonian Nightmare from the battlefield to your hand
2. When Greedy Freebooter dies, it triggers, creating a Treasure token and causing you to scry 1
3. Resolve the Chthonian Nightmare ability, returning Priest of Urabrask from your graveyard to the battlefield
4. When Priest of Urabrask enters the battlefield, it triggers, adding
5. Activate the Treasure by tapping and sacrificing it, adding
6. Cast Chthonian Nightmare by paying
7. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
8. Activate Chthonian Nightmare by paying , sacrificing Priest of Urabrask and returning Chthonian Nightmare from the battlefield to your hand, returning Greedy Freebooter from your graveyard to the battlefield
9. Cast Chthonian Nightmare by paying
10. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
11. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite scry 1
• Infinite storm count
• Infinite energy counters