Echocasting Symposium + Eternal Witness + Time Warp

3-card combo · GU

Verdict

Yes — this 3-card loop generates infinite turns with no mana required beyond the initial Time Warp cast.

Cards required: 3
Cheapest stack total: $28.96
Color identity: GU
Popularity: 26 decks
Format: Commander

Buy required cards on TCGplayer

Echocasting Symposium's paradigm trigger fires at the start of each precombat main phase, creating a free Eternal Witness token that returns Time Warp to hand from the graveyard — then the next turn starts and the engine repeats itself. The loop lives in green-blue extra-turns shells, where Time Warp was already pulling weight and Eternal Witness was already the recursion backbone.

Recipe

How it works

Prerequisites

—

Steps

Cast Time Warp by paying its mana cost, causing you to take an extra turn after this one.
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.
Resolve the copy, creating a token copy of Eternal Witness
When the Eternal Witness token enters, it triggers, returning Time Warp from your graveyard to your hand.
Repeat.

Result

Infinite turns; Lock

Variations

Cheaper, tighter, alternate lines

Walk the Aeons and Capture of Jingzhou are direct Time Warp substitutes if removal hits before the loop closes. Seasons Past can replace Eternal Witness in lists that want redundancy across the graveyard recursion slot, though it adds a cast step and slows the loop by one phase.