Chthonian Nightmare + Time Stretch + Timeless Witness

Chthonian Nightmare

Time Stretch

Timeless Witness

How it works

1. Cast Time Stretch by paying 8, causing you to take two extra turns after this one.
2. Move to your next turn.
3. Cast Chthonian Nightmare by paying 1.
4. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
5. Activate Chthonian Nightmare by paying EEEE, sacrificing a creature with mana value 2 or less, and returning Chthonian Nightmare from the battlefield to your hand, returning Timeless Witness from your graveyard to the battlefield.
6. When Timeless Witness enters the battlefield, it triggers, returning Time Stretch from your graveyard to your hand.
7. Cast Chthonian Nightmare by paying 1.
8. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
9. Activate Chthonian Nightmare by paying at most EE, sacrificing Timeless Witness, and returning Chthonian Nightmare from the battlefield to your hand, returning a creature with mana value 2 or less from your graveyard to the battlefield.
10. Repeat during your second turn.

This brilliant loop revolves around chaining extra turns with Time Stretch while using Chthonian Nightmare as a recurring engine to recycle your threats and generate energy. By sacrificing Timeless Witness to bring back a smaller creature, you trigger the Witness's ability to pull Time Stretch right back to your hand for the next turn. Meanwhile, Chthonian Nightmare effortlessly bounces back to your hand every cycle, ensuring you can replay it and the retrieved Timeless Witness over and over to lock down the game.