How can you create a combo with Saheeli, Sublime Artificer, Mirror of Fate, Karn's Temporal Sundering?
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[START OF COMBO]This combo can be formed with Saheeli, Sublime Artificer, Mirror of Fate, Karn's Temporal Sundering

Color identity: UR
Mana cost: {5}{U}{U}{U/R}{U/R} each odd-numbered turn, with {4}{U}{U} available each even-numbered turn
Steps:
  1. Cast Karn's Temporal Sundering by paying {4}{U}{U}.
  2. Saheeli triggers, creating a 1/1 Servo artifact creature token.
  3. Resolve Karn's Temporal Sundering, causing you to take an extra turn after this one, return Saheeli from the battlefield to your hand if Saheeli has fewer than three loyalty counters, and exile Karn's Temporal Sundering.
  4. Cast Saheeli by paying {1}{U/R}{U/R} if it's in your hand.
  5. Activate Saheeli by removing two loyalty counters from it, causing the Servo to become a copy of Mirror of Fate until end of turn.
  6. Activate the Servo by tapping and sacrificing it, choosing Karn's Temporal Sundering and up to six other cards face up in exile, then exiling your library and putting the chosen cards on top of your library, with Karn's Temporal Sundering being the top most card.
  7. Move to your next turn, drawing Karn's Temporal Sundering during your draw step.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Saheeli, Sublime Artificer must be on the battlefield
  - Mirror of Fate must be on the battlefield
  - Karn's Temporal Sundering must be in your hand
[END OF COMBO PREREQUISITES]
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