Chthonian Nightmare, Notorious Throng, and Donnie & April, Adorkable Duo

Prerequisites

• Chthonian Nightmare in hand
• Notorious Throng in hand
• Donnie & April, Adorkable Duo in the graveyard
• the first turn, with each extra turn plus each turn available

Steps

1. Deal combat damage using a Rogue Cast Notorious Throng for its prowl cost by paying , causing you to take an extra turn after this one
2. Move to your next turn
3. Cast Chthonian Nightmare by paying
4. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
5. Activate Chthonian Nightmare by paying , sacrificing a creature with mana value 1 or less, and returning Chthonian Nightmare from the battlefield to your hand, returning Donnie & April from your graveyard to the battlefield
6. When Donnie & April enters the battlefield, it triggers, returning Notorious Throng from your graveyard to your hand
7. Cast Chthonian Nightmare by paying
8. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get
9. Activate Chthonian Nightmare by paying at most , sacrificing Donnie & April, and returning Chthonian Nightmare from the battlefield to your hand, returning a creature with mana value 1 or less from your graveyard to the battlefield
10. Repeat

Results

• Infinite turns
• Lock