Progenitor Mimic + Salvager of Secrets + Temporal Manipulation

Progenitor Mimic

Salvager of Secrets

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 Salvager of Secrets.
3. When the token Salvager of Secrets enters the battlefield, it triggers itself, returning Temporal Manipulation from your graveyard to your hand.
4. Repeat.