Chthonian Nightmare, and Dockside Extortionist

Prerequisites

• Chthonian Nightmare on the battlefield
• Dockside Extortionist in the graveyard
• You have at least two energy counters
• Opponents control at least four artifacts and/or enchantments
• You control another nontoken creature with mana value 4 or less

Steps

1. Activate Chthonian Nightmare by paying , sacrificing a nontoken creature with mana value 4 or less and returning Chthonian Nightmare from the battlefield to your hand, returning Dockside Extortionist from your graveyard to the battlefield
2. When Dockside Extortionist enters the battlefield, it triggers, creating at least four Treasure tokens
3. Activate four Treasures by tapping and sacrificing them, adding
4. Cast Chthonian Nightmare by paying
5. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
6. Activate Chthonian Nightmare by paying at most , sacrificing Dockside Extortionist and returning Chthonian Nightmare from the battlefield to your hand, returning a creature with mana value 4 or less from your graveyard to the battlefield
7. Cast Chthonian Nightmare by paying
8. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
9. Repeat
10. If opponents control five or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana
11. If the creature sacrificed has mana value 3 or less, this combo nets infinite energy counters

Results

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