Jorn, God of Winter // Kaldring, the Rimestaff, Lithoform Engine, and Moritte of the Frost

Prerequisites

• Jorn, God of Winter // Kaldring, the Rimestaff on the battlefield
• Lithoform Engine on the battlefield
• Moritte of the Frost in hand
• Jorn does not have summoning sickness
• Snow permanents you control can tap to produce at least
• available

Steps

1. Cast Moritte by paying , having it enter as a copy of Lithoform Engine
2. Put Lithoform Engine into your graveyard due to the legend rule
3. Declare Jorn as an attacker, triggering its ability
4. Holding priority, activate all mana producing snow permanents you control by tapping them, adding at least
5. Activate Moritte's first ability by paying and tapping it, copying Jorn's triggered ability
6. Resolve the copy of Jorn's ability, untapping all snow permanents you control
7. Repeat from step 4

Results

• Infinite mana snow permanents you control can produce
• Infinite untap of snow permanents you control