Doppelgang + Mystic Sanctuary + Commander's Sphere

3-card combo · GU

Verdict

Yes — this self-recurring Doppelgang loop generates infinite mana, infinite copies of every permanent you control, and infinite storm count in a single green-blue shell.

Cards required

Cheapest stack total

$2.15

Color identity

Popularity

152 decks

Format

Commander

Buy required cards on TCGplayer

Doppelgang at X=4 copies Mystic Sanctuary four times; those Sanctuary tokens immediately put Doppelgang back on top of the library, and a sacrificed Commander's Sphere token draws it back. The loop recasts itself each iteration for

funded by the token copies of your mana producers, snowballing into infinite permanents and infinite landfall triggers along the way — a Riku of Two Reflections or Aesi, Tyrant of Gyre Strait deck's dream line.

How it works

Prerequisites

You control at least two additional Islands. You control at least two additional permanents that enter the battlefield untapped and can collectively tap to produce at least if the two additional Islands enter the battlefield tapped.

Steps

Cast Doppelgang by paying , creating four token copies of Mystic Sanctuary, Commander's Sphere, and two other permanents that enter the battlefield untapped and can collectively tap to produce at least .
When the Mystic Sanctuary tokens enter the battlefield untapped, they trigger, putting Doppelgang on top of your library from your graveyard.
Activate a Commander's Sphere token's second ability by sacrificing it, causing you to draw Doppelgang.
Activate the four Mystic Sanctuary tokens by tapping them, adding .
Activate the three Commander's Sphere tokens' first abilities by tapping them, adding .
Activate seven of the other permanent tokens created in step 1 by tapping them, adding at least .
Repeat.

Result

Infinite storm count; Infinite card draw; Infinite blue mana; Infinite draw triggers; Infinite magecraft triggers; Infinite landfall triggers; Infinite copies of all permanents; Infinite mana permanents you control can produce; Infinite Island tokens

Cheaper, tighter, alternate lines

The mana-producer requirement is the real constraint here — the two non-Sanctuary, non-Sphere permanents must collectively tap for at least

untapped, so acceleration like Sol Ring or Simic Signet covers the gap cleanly. The combo generates infinite mana and infinite storm count but needs an outlet to close; Thassa's Oracle with a milled library or a damage-based spell on infinite storm count both end the game.

Doppelgang + Mystic Sanctuary + Commander's Sphere

How it works

Cheaper, tighter, alternate lines

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