Infinite Turns Combos

Infinite turns combos are the most unambiguous win condition in Commander — not a path to a winning board state, but a declaration that the game is over. When a player assembles one of these lines, opponents don't get another draw step, another combat, another chance to find an answer. The game resolves.

The dominant engine across this category is Eternal Witness looped with an extra-turn spell. Ephemerate, Thassa, Deep-Dwelling, and Soulherder each do the same structural job: bounce or flicker Eternal Witness at end of turn, return the extra-turn spell — Time Warp or Temporal Manipulation — to hand, cast it, repeat indefinitely. The three-card version is the most compact form of the loop and the reason Eternal Witness shows up in so many blue-green shells regardless of commander. Ghostly Flicker extends the same idea into a four-card version using Mystic Sanctuary to reset Walk the Aeons, which trades a card slot for redundancy across a wider range of decks.

The Magosi, the Waterveil line — completed with Nesting Grounds and Karn's Bastion — is structurally different and significantly more obscure. It exploits the skip-a-turn penalty built into Magosi by moving its eon counter off with Nesting Grounds and proliferating it back on with Karn's Bastion, generating infinite turns through a land-based loop that dodges most spell-based hate. It's slower to assemble but harder to interact with at instant speed.

God-Eternal Kefnet with Isochron Scepter and Brainstorm represents the control-oriented end of the spectrum — a four-card line that requires more setup but pays off with a combo embedded in a permission shell.

The practical difference between these lines matters for deckbuilding. The Eternal Witness loops demand creatures surviving to the next turn, which means they're vulnerable to removal and board wipes in the window between casting the witness and untapping. The land-based Magosi loop is resilient to creature removal but slow to execute. Decks that want a clean, redundant infinite-turns package usually run multiple versions of the witness loop — Ephemerate and Thassa and Soulherder — so that losing one enabler doesn't dismantle the whole plan.

Infinite turns as a win condition also raises the bracket question directly. Unlike infinite damage or infinite mana, infinite turns require the pilot to actually close the game — drawing cards and attacking each additional turn until opponents are eliminated. That makes it more interactive than some combo finishers, but no less decisive once it's assembled.