Derevi, Empyrial Tactician, Displacer Kitten, and Retraction Helix

Prerequisites

• Derevi, Empyrial Tactician on the battlefield
• Displacer Kitten on the battlefield
• Retraction Helix in hand
• You control a creature other than Derevi that does not have summoning sickness
• available

Steps

1. Cast Retraction Helix by paying , targeting any creature you control except Derevi that does not have summoning sickness
2. Displacer Kitten triggers, blinking Derevi
3. When Derevi enters the battlefield, it triggers, untapping the creature targeted in step 1
4. Resolve Retraction Helix
5. Cast the permanent from your hand by paying
6. Displacer Kitten triggers, blinking Derevi
7. When Derevi enters the battlefield, it triggers, untapping the creature targeted by Retraction Helix
8. Resolve the permanent spell
9. Activate the creature targeted by Retraction Helix by tapping it, returning the permanent cast in step 5 from the battlefield to your hand
10. Repeat from step 5

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count