How can you create a combo with Aesi, Tyrant of Gyre Strait, Doppelgang, Mystic Sanctuary?
user
[START OF COMBO]This combo can be formed with Aesi, Tyrant of Gyre Strait, Doppelgang, Mystic Sanctuary

Color identity: GU
Mana cost: {12}{G}{U}
Steps:
  1. Cast Doppelgang by paying {12}{G}{U}, creating four token copies of Mystic Sanctuary and three other permanents that enter the battlefield untapped and can collectively tap to produce at least {2}{G}.
  2. When the tokens enter the battlefield untapped, each Mystic Sanctuary token triggers, and Aesi triggers for each land token that entered the battlefield.
  3. Resolve all Mystic Sanctuary triggers, putting Doppelgang on top of your library from your graveyard.
  4. Resolve all Aesi triggers, causing you to Doppelgang, and optionally allowing you to draw a card for each remaining trigger.
  5. Activate the four Mystic Sanctuary tokens by tapping them, adding {U}{U}{U}{U}.
  6. Activate ten of the other permanent tokens created in step 1 by tapping them, adding at least {9}{G}.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite storm count
  - Infinite card draw
  - Infinite blue mana
  - Infinite draw triggers
  - Infinite magecraft triggers
  - Infinite landfall triggers
  - Infinite copies of any permanent on the battlefield
  - Infinite mana permanents can produce
  - Infinite Island tokens[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Aesi, Tyrant of Gyre Strait must be on the battlefield
  - Doppelgang must be in your hand
  - Mystic Sanctuary must be on the battlefield
  - You control at least two additional Islands.
  - You control at least three additional permanents that enter the battlefield untapped and can collectively tap to produce at least {2}{G}.
[END OF COMBO PREREQUISITES]
assistant