How can you create a combo with Spellbinder, Aggravated Assault, Turnabout?
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[START OF COMBO]This combo can be formed with Spellbinder, Aggravated Assault, Turnabout

Color identity: UR
Mana cost: 
Steps:
  1. Deal combat damage with the creature that has Spellbinder attached.
  2. Spellbinder triggers, casting a copy of Turnabout without paying its mana cost.
  3. Resolve Turnabout, untapping all tapped lands you control.
  4. Move to your postcombat main phase.
  5. Activate all mana-producing lands you control by tapping them, adding at least {3}{R}{R}.
  6. Activate Aggravated Assault by paying {3}{R}{R}, untapping all creatures you control and causing you to get an addtional combat phase and main phase after this one.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite combat damage
  - Infinite combat phases
  - Infinite magecraft triggers
  - Infinite storm count
  - Infinite untap of lands you control
  - Infinite mana lands you control can produce[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Spellbinder must be on the battlefield
  - Aggravated Assault must be on the battlefield
  - Turnabout must be exiled
  - Spellbinder attached to a creature that cannot be blocked and killed by an opponent.
  - The creature with Spellbinder attached can attack this turn.
  - Lands you control can tap to produce at least {3}{R}{R}.
[END OF COMBO PREREQUISITES]
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