How can you create a combo with Bond of Insight, Twincast, Turnabout?
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[START OF COMBO]This combo can be formed with Bond of Insight, Twincast, Turnabout

Color identity: U
Mana cost: {5}{U}{U}{U}
Steps:
  1. Cast Bond of Insight by paying {3}{U}.
  2. Holding priority, cast Turnabout by paying {2}{U}{U}, untapping all lands you control.
  3. Activate all mana-producing lands you control by tapping them, adding at least {2}{U}{U}{U}{U}.
  4. Holding priority, cast Twincast by paying {U}{U}, copying Bond of Insight.
  5. Resolve the copy of Bond of Insight, causing each player to mill four cards, and returning Turnabout and Twincast from your graveyard to your hand.
  6. Repeat from step 2.
  7. If lands you control can tap to produce at least {3}{U}{U}{U}{U}, this combo nets infinite mana, which can be used to infinitely cast instants instead of continuing to copy Turnabout.[END OF COMBO STEPS]

Result:
  - Infinite mill
  - Infinite self-mill
  - Infinite storm count
  - Infinite mana lands you control can produce
  - Infinite magecraft triggers
  - Put all instant and sorcery cards from your graveyard and library into your hand
  - Infinite casts of instants in your graveyard and/or hand[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be in your hand
  - Lands you control can tap to produce at least {2}{U}{U}{U}{U}
[END OF COMBO PREREQUISITES]
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