Chthonian Nightmare + Patron of the Arts + Umori, the Collector

Chthonian Nightmare

Patron of the Arts

Umori, the Collector

How it works

1. Activate Chthonian Nightmare by paying at most EEE, 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 another creature card from your graveyard to the battlefield.
4. Activate the Treasure by tapping and sacrificing it, adding .
5. Cast Chthonian Nightmare by paying .
6. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
7. Activate Chthonian Nightmare by paying EEE, sacrificing another creature and returning Chthonian Nightmare from the battlefield to your hand, returning Patron of the Arts from your graveyard to the battlefield.
8. When Patron of the Arts enters the battlefield, it triggers, creating a Treasure token.
9. Activate the Treasure by tapping and sacrificing it, adding .
10. Cast Chthonian Nightmare by paying .
11. When Chthonian Nightmare enters the battlefield, it triggers, causing you to get EEE.
12. Repeat.

This clever loop turns the energy from Chthonian Nightmare into an endless cycle of sacrifice and rebirth by leveraging Patron of the Arts to constantly refund your mana. Each time Patron of the Arts enters or dies, it generates a Treasure token that easily pays to recast your enchantment, while the energy spent is continually replenished by Chthonian Nightmare's entrance trigger. Meanwhile, Umori, the Collector sits quietly in the background, its static cost-reduction ability ensuring that recasting Chthonian Nightmare is always cheap enough to be fueled entirely by the treasures you are churning out.