Chthonian Nightmare, Priest of Gix, and Pitiless Plunderer

Prerequisites

• Chthonian Nightmare on the battlefield
• Priest of Gix in the graveyard
• Pitiless Plunderer on the battlefield
• You have at least
• You control a nontoken creature with mana value 3 or less

Steps

1. Activate Chthonian Nightmare by paying , sacrificing a creature with mana value 3 or less and returning Chthonian Nightmare from the battlefield to your hand
2. When the creature dies, Pitiless Plunderer triggers, creating a Treasure token
3. Resolve the Chthonian Nightmare ability, returning Priest of Gix from your graveyard to the battlefield
4. When Priest of Gix 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 at most , sacrificing Priest of Gix and returning Chthonian Nightmare from the battlefield to your hand
9. When Priest of Gix dies, Pitiless Plunderer triggers, creating a Treasure token
10. Resolve the Chthonian Nightmare ability, returning another creature with mana value 3 or less from your graveyard to the battlefield
11. Cast Chthonian Nightmare by paying
12. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
13. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite Treasure tokens
• Infinite energy counters