Echocasting Symposium + Mnemonic Wall + Time Warp

Echocasting Symposium

Mnemonic Wall

Time Warp

How it works

1. Cast Time Warp 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 Mnemonic Wall
4. When the Mnemonic Wall token enters, it triggers, returning Time Warp from your graveyard to your hand.
5. Repeat.

This clever extra-turn loop relies on the delayed value of Echocasting Symposium's paradigm ability to let you recast it for free at the beginning of each of your main phases. When that free copy resolves, it targets your creature to create a token copy of Mnemonic Wall. The entering Mnemonic Wall token triggers to pull Time Warp right back out of your graveyard into your hand, allowing you to cast Time Warp again to secure an endless sequence of extra turns.