Commander's Sphere + Doppelgang + Mystic Sanctuary

Mana needed: {12}{G}{U}

GU identity

Commander legal

The 3 combo pieces

What must be in place

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 {2} if the two additional Islands enter the battlefield tapped.

How to execute it

  1. Cast Doppelgang by paying {12}{G}{U}, 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 {2}.
  2. When the Mystic Sanctuary tokens enter the battlefield untapped, they trigger, putting Doppelgang on top of your library from your graveyard.
  3. Activate a Commander's Sphere token's second ability by sacrificing it, causing you to draw Doppelgang.
  4. Activate the four Mystic Sanctuary tokens by tapping them, adding {U}{U}{U}{U}.
  5. Activate the three Commander's Sphere tokens' first abilities by tapping them, adding {2}{G}.
  6. Activate seven of the other permanent tokens created in step 1 by tapping them, adding at least {7}.
  7. Repeat.

What the combo produces