Teleportation Circle + Eternal Witness + Time Warp

Teleportation Circle

Eternal Witness

Time Warp

How it works

1. Cast Time Warp by paying 3, causing you to take an extra turn after this one.
2. At the beginning of your end step, Teleportation Circle triggers, blinking Eternal Witness.
3. When Eternal Witness enters the battlefield, it triggers, returning Time Warp to your hand from your graveyard.
4. Repeat each turn.