Activate Rimefeather Owl by paying {1}{S}, putting an ice counter on Strionic Resonator, causing Strionic Resonator to become a snow permanent.
Move to your combat phase, and declare Jorn as an attacker, triggering its ability.
Holding priority, activate all mana producing snow permanents you control by tapping them, adding at least {3}.
Activate Strionic Resonator by paying {2} and tapping it, copying Jorn's triggered ability.
Resolve the copy of Jorn's ability, untapping all snow permanents you control.
Repeat from step 3.

Infinite mana snow permanents you control can produce

Infinite untap of snow permanents you control

Jorn, God of Winter // Kaldring, the Rimestaff

Rimefeather Owl

Strionic Resonator

Activate a land you control by tapping it, adding at least {1}{U}.
Activate Rimefeather Owl by paying {1}{S}, putting a snow counter on the land, causing the land to become a snow permanent.
Activate Sculptor of Winter by tapping it, untapping the land.
Activate Freed from the Real's second ability by paying {U}, untapping Sculptor of Winter.
Activate the land with the snow counter on it by tapping it, adding at least {1}{U}.
Repeat from step 3.

Infinite mana lands you control can produce

Infinite untap of lands you control

Sculptor of Winter

Freed from the Real

Activate a permanent you control by tapping it, adding at least {1}{U}.
Activate Rimefeather Owl by paying {1}{S}, putting a snow counter on the mana producing permanent, causing the permanent to become a snow permanent.
Activate Rime Tender by tapping it, untapping the mana producing permanent.
Activate Freed from the Real's second ability by paying {U}, untapping Rime Tender.
Activate the permanent with the snow counter on it by tapping it, adding at least {1}{U}.
Repeat from step 3.

Infinite mana permanents you control can produce

Rime Tender

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

Lithoform Engine

Activate a land you control by tapping it, adding at least {1}{U}.
Activate Rimefeather Owl by paying {1}{S}, putting a snow counter on the land, causing the land to become a snow permanent.
Activate Sculptor of Winter by tapping it, untapping the land.
Activate Pemmin's Aura's first ability by paying {U}, untapping Sculptor of Winter.
Activate the land with the snow counter on it by tapping it, adding at least {1}{U}.
Repeat from step 3.

Pemmin's Aura

Activate a permanent you control by tapping it, adding at least {1}{U}.
Activate Rimefeather Owl by paying {1}{S}, putting a snow counter on the mana producing permanent, causing the permanent to become a snow permanent.
Activate Rime Tender by tapping it, untapping the mana producing permanent.
Activate Pemmin's Aura's first ability by paying {U}, untapping Rime Tender.
Activate the permanent with the snow counter on it by tapping it, adding at least {1}{U}.
Repeat from step 3.

Activate Rimefeather Owl by paying {1}{U}, putting an ice counter on Soldevi Adnate and causing it to become snow.
Activate Soldevi Adnate by tapping it and sacrificing Narfi, adding {B}{B}{B}{B}{B}.
 Activate Narfi by paying {S}{S}{S}, returning it from your graveyard to the battlefield.
When Narfi enters the battlefield, Intruder Alarm triggers, untapping all creatures.
Repeat from step 2.

Infinite black mana

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite mana creatures you control can produce

Infinite sacrifice triggers

Infinite snow mana

Infinite untap of creatures

Infinite untap of creatures you control

Narfi, Betrayer King

Soldevi Adnate

Intruder Alarm

Activate Rimefeather Owl by paying {1}{U}, putting an ice counter on Soldevi Adnate and causing it to become snow.
Activate Soldevi Adnate by tapping it and sacrificing Narfi, adding {B}{B}{B}{B}{B}.
When Narfi dies, Soldevi Adnate triggers, untapping itself.
Activate Narfi by paying {S}{S}{S}, returning it from your graveyard to the battlefield.
Repeat from step 2.

Combos with "Rimefeather Owl"