Szarel, Genesis Shepherd, Crystalline Crawler, Umbral Collar Zealot, and Squee, the Immortal

Prerequisites

• Szarel, Genesis Shepherd on the battlefield
• Crystalline Crawler on the battlefield
• Umbral Collar Zealot on the battlefield
• Squee, the Immortal in exile or in the graveyard

Steps

1. Cast Squee from your graveyard by paying
2. Activate Umbral Collar Zealot by sacrificing Squee
3. When Squee is sacrificed, Szarel triggers, putting a number of +1/+1 counters equal to Szarel's power on Crystalline Crawler
4. Resolve the Umbral Collar Zealot ability
5. Activate Crystalline Crawler three times by removing three +1/+1 counters from it, adding
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Infinite +1/+1 counters
• Infinite surveil 1