Szarel, Genesis Shepherd, Crystalline Crawler, Spawning Pit, and Bloodsoaked Champion

Prerequisites

• Szarel, Genesis Shepherd on the battlefield
• Crystalline Crawler on the battlefield
• Spawning Pit on the battlefield
• Bloodsoaked Champion in the graveyard

Steps

1. Activate Bloodsoaked Champion by paying , returning it from your graveyard to the battlefield
2. Activate Spawning Pit by sacrificing Bloodsoaked Champion
3. When Bloodsoaked Champion is sacrificed, Szarel triggers, putting a number of +1/+1 counters equal to Szarel's power on Crystalline Crawler
4. Resolve the Spawning Pit ability
5. Activate Crystalline Crawler twice by removing two +1/+1 counters from it, adding
6. Repeat

Results

• Infinite +1/+1 counters on creatures you control
• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite artifact tokens
• Infinite charge counters on a permanent
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers