Echocasting Symposium + Scrivener + Time Walk

Echocasting Symposium

Scrivener

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. 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 Scrivener
4. When the Scrivener token enters, it triggers, returning Time Walk from your graveyard to your hand.
5. Repeat.

This vintage-legal loop achieves infinite turns by recycling a single copy of Time Walk through a clever sequence of triggers. The engine relies on Echocasting Symposium's paradigm ability to continually cast itself from exile on your main phases, which creates a token copy of Scrivener. Each time the Scrivener token enters the battlefield, its triggered ability plucks Time Walk right back out of your graveyard and puts it into your hand, ready to be cast again to chain straight into your next extra turn.