Echocasting Symposium + Scholar of the Ages + Temporal Manipulation

Echocasting Symposium

Scholar of the Ages

Temporal Manipulation

How it works

1. Cast Temporal Manipulation by paying its mana cost, causing you to take an extra turn after this one.
2. Move to your next turn. At the beginning of your precombat main phase, Echocasting Symposium's paradigm ability triggers, causing you to cast a copy of it from exile.
3. Resolve the copy, creating a token copy of Scholar of the Ages
4. When the Scholar of the Ages token enters, it triggers, returning Temporal Manipulation from your graveyard to your hand.
5. Repeat.