Delney, Streetwise Lookout + Oltec Matterweaver + Cavern Harpy

Delney, Streetwise Lookout

Oltec Matterweaver

Cavern Harpy

How it works

1. Cast Cavern Harpy by paying .
2. Oltec Matterweaver triggers twice, creating two copies of a Treasure token you control.
3. When Cavern Harpy enters the battlefield, it triggers twice, returning itself and another creature with mana value 2 or less that can be cast using colored mana from the battlefield to your hand.
4. If needed, activate a Treasure by tapping and sacrificing it, adding one mana of any color.
5. Repeat step 4 one additional time if you do not have enough mana to cast the other creature returned to your hand in step 3.
6. Cast the other creature returned to your hand in step 3 by paying its mana cost.
7. Oltec Matterweaver triggers twice, creating two copies of a Treasure token you control.
8. Activate two Treasures by tapping and sacrificing them, adding .
9. Repeat.

This fascinating loop turns a simple bounce creature into an explosive engine by leveraging Delney, Streetwise Lookout to double every single creature and triggered ability on your battlefield. With Delney amplifying Oltec Matterweaver's cast triggers, every creature you play floods the board with doubled artifact token copies—like Treasured loot—while Cavern Harpy uses its self-bounce ability to continuously reset the loop. Paying Cavern Harpy's life cost is easily sustained by the mana produced from your copied Treasures, letting you loop the Harpy and churn through infinite creature casts, triggers, and artifact tokens without running out of steam.