Retraction Helix + Sunstrike Legionnaire

Retraction Helix

Sunstrike Legionnaire

How it works

1. Cast Banishing Knack by paying , targeting Sunstrike Legionnaire.
2. Activate Sunstrike Legionnaire by tapping it, returning the creature that costs no mana from the battlefield to your hand.
3. Cast that creature by paying 0.
4. When that creature enters, Sunstrike Legionnaire triggers, untapping Sunstrike Legionnaire.
5. Repeat from step 2.