Echocasting Symposium + Vampire Charmseeker + Walk the Aeons

Echocasting Symposium

Vampire Charmseeker

Walk the Aeons

How it works

1. Cast Walk the Aeons 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 Vampire Charmseeker
4. When the Vampire Charmseeker token enters, it triggers, returning Walk the Aeons from your graveyard to your hand.
5. Repeat.

This brilliant loop achieves infinite turns by using Echocasting Symposium's delayed paradigm ability to repeatedly cast a copy of itself for free at the beginning of your main phases. Each time that copy resolves, it targets Echocasting Symposium's effect to create a token copy of Vampire Charmseeker. When that Vampire Charmseeker token enters the battlefield, its triggered ability plucks Walk the Aeons straight out of your graveyard and back to your hand, allowing you to cast it again and take another turn.