Progenitor Mimic + Warden of the Eye + Temporal Manipulation

Progenitor Mimic

Warden of the Eye

Temporal Manipulation

How it works

1. Cast Temporal Manipulation by paying its mana cost, taking an extra turn after this one.
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Warden of the Eye.
3. When the token Warden of the Eye enters the battlefield, it triggers itself, returning Temporal Manipulation from your graveyard to your hand.
4. Repeat.