Ephemerate + Ardent Elementalist + Time Walk

Ephemerate

Ardent Elementalist

Time Walk

How it works

1. Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one.
2. Cast Ephemerate by paying , blinking Ardent Elementalist and exiling Ephemerate.
3. When Ardent Elementalist enters, it triggers, returning Time Walk from your graveyard to your hand.
4. Move to your next turn. At the beginning of your upkeep, Ephemerate's rebound ability triggers, causing you to cast it from exile without paying its mana cost.
5. Resolve Ephemerate, blinking Ardent Elementalist.
6. When Ardent Elementalist enters, it triggers, returning Ephemerate from your graveyard to your hand.
7. Repeat.