How can you create a combo with Najeela, the Blade-Blossom, Spellbinder, Turnabout?
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[START OF COMBO]This combo can be formed with Najeela, the Blade-Blossom, Spellbinder, Turnabout

Color identity: WUBRG
Mana cost: 
Steps:
  1. Declare Najeela and the creature with Spellbinder attached as an attacker.
  2. Najeela triggers, creating a 1/1 Warrior creature token that's tapped and attacking.
  3. Holding priority, activate all mana-producing lands you control by tapping them, adding at least {W}{U}{B}{R}{G}.
  4. Activate Najeela by paying {W}{U}{B}{R}{G}, untapping all attacking creatures, giving them trample, lifelink and haste, and gaining an additional combat phase after this one.
  5. Deal combat damage with the creature that has Spellbinder attached, causing you to gain life equal to the amount of damage dealt this way.
  6. Spellbinder triggers, casting a copy of Turnabout without paying its mana cost.
  7. Resolve Turnabout, untapping all tapped lands you control.
  8. Repeat each combat phase.[END OF COMBO STEPS]

Result:
  - Infinite combat damage
  - Infinite combat phases
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite lifegain
  - Infinite lifegain triggers
  - 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:
  - Najeela, the Blade-Blossom must be on the battlefield
  - Spellbinder must be on the battlefield
  - Turnabout must be exiled
  - Spellbinder attached to a creature that cannot be blocked and killed by an opponent.
  - Najeela and the creature with Spellbinder attached can attack this turn.
  - Lands you control can tap to produce at least {W}{U}{B}{R}{G}.
[END OF COMBO PREREQUISITES]
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