Chthonian Nightmare, Patron of the Arts, and Priest of Urabrask

Prerequisites

• Chthonian Nightmare on the battlefield
• Patron of the Arts on the battlefield
• Priest of Urabrask in the graveyard
• You have at least

Steps

1. Activate Chthonian Nightmare by paying , sacrificing Patron of the Arts and returning Chthonian Nightmare from the battlefield to your hand
2. When Patron of the Arts dies, it triggers, creating a Treasure token
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 Patron of the Arts from your graveyard to the battlefield
9. When Patron of the Arts enters the battlefield, it triggers, creating a Treasure token
10. Activate the Treasure by tapping and sacrificing it, adding
11. Cast Chthonian Nightmare by paying
12. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
13. Repeat

Results

• Infinite red mana
• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count