Kykar, Zephyr Awakener + Eternal Witness + Time Warp

Kykar, Zephyr Awakener

Eternal Witness

Time Warp

How it works

1. Cast Time Warp by paying its mana cost.
2. Kykar triggers, exiling Eternal Witness.
3. Resolve Time Warp, causing you to take an extra turn after this one.
4. At the beginning of your end step, Kykar triggers, returning Eternal Witness from exile to the battlefield.
5. When Eternal Witness enters, it triggers, returning Time Warp from your graveyard to your hand.
6. Repeat each turn.