Delney, Streetwise Lookout + Mox Amber + Kor Skyfisher + Gathering Stone

Delney, Streetwise Lookout

Mox Amber

Kor Skyfisher

Gathering Stone

How it works

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