Derevi, Empyrial Tactician + Displacer Kitten + Retraction Helix

Derevi, Empyrial Tactician

Displacer Kitten

Retraction Helix

How it works

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 0.
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.