Szarel, Genesis Shepherd, Crystalline Crawler, Viscera Seer, and Gravecrawler

Prerequisites

• Szarel, Genesis Shepherd on the battlefield
• Crystalline Crawler on the battlefield
• Viscera Seer on the battlefield
• Gravecrawler in the graveyard
• available

Steps

1. Cast Gravecrawler from your graveyard by paying its mana cost
2. Activate Viscera Seer by sacrificing Gravecrawler
3. When Gravecrawler is sacrificed, Szarel triggers, putting a number of +1/+1 counters equal to Szarel's power on Crystalline Crawler
4. Resolve the Viscera Seer ability
5. Activate Crystalline Crawler by removing a +1/+1 counter from it, adding
6. Repeat

Results

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