Delney, Streetwise Lookout + Mox Amber + Umori, the Collector + Kor Skyfisher

Delney, Streetwise Lookout

Mox Amber

Umori, the Collector

Kor Skyfisher

How it works

1. Cast Mox Amber by paying 0.
2. Activate Mox Amber by tapping it, adding .
3. Cast Kor Skyfisher by paying .
4. When Kor Skyfisher enters the battlefield, it triggers twice due to Delney, returning Mox Amber and Kor Skyfisher from the battlefield to your hand.
5. Repeat.

This clever loop turns the unassuming Kor Skyfisher into an infinite-value engine by leveraging Delney, Streetwise Lookout to double its entry trigger. Because Kor Skyfisher's power is 2 or less, Delney ensures its ETB ability triggers twice instead of once, allowing you to return both Mox Amber and the Skyfisher itself back to your hand. You can then replay Mox Amber for free—its mana fueled further by cost-reducers like Umori, the Collector naming artifacts—to generate the white mana needed to recast Kor Skyfisher and repeat the entire sequence.