Narfi, Betrayer King, Rimefeather Owl, Soldevi Adnate, and Intruder Alarm

Prerequisites

• Narfi, Betrayer King on the battlefield
• Rimefeather Owl on the battlefield
• Soldevi Adnate on the battlefield
• Intruder Alarm on the battlefield
• Soldevi Adnate does not have summoning sickness
• available

Steps

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

Results

• 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 all creatures