How can you create a combo with Jorn, God of Winter // Kaldring, the Rimestaff, Rimefeather Owl, Lithoform Engine?
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[START OF COMBO]This combo can be formed with Jorn, God of Winter // Kaldring, the Rimestaff, Rimefeather Owl, Lithoform Engine

Color identity: BGU
Mana cost: {1}{S}
Steps:
  1. Activate Rimefeather Owl by paying {1}{S}, putting an ice counter on Lithoform Engine, causing Lithoform Engine to become a snow permanent.
  2. Move to your combat phase, and declare Jorn as an attacker, triggering its ability.
  3. Holding priority, activate all mana producing snow permanents you control by tapping them, adding at least {3}.
  4. Activate Lithoform Engine's first ability by paying {2} and tapping it, copying Jorn's triggered ability.
  5. Resolve the copy of Jorn's ability, untapping all snow permanents you control.
  6. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite mana snow permanents you control can produce
  - Infinite untap of snow permanents you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Jorn does not have summoning sickness.
  - Snow permanents you control can tap to produce at least {3}.
[END OF COMBO PREREQUISITES]
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