Emiel the Blessed, Norn's Choirmaster, Crystalline Crawler, and Cryptic Trilobite

Prerequisites

• Emiel the Blessed on the battlefield
• Norn's Choirmaster on the battlefield
• Crystalline Crawler on the battlefield
• Cryptic Trilobite on the battlefield
• Your commander on the battlefield
• Crystalline Crawler and Cryptic Trilobite have at least one +1/1 counter on them
• available

Steps

1. Activate Emiel by paying , blinking your commander
2. Your commander enters the battlefield, triggering Norn's Choirmaster, putting a +1/+1 counter on Cryptic Trilobite and Crystalline Crawler
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
4. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding that can only be spent to activate abilities
5. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite proliferate