Szarel, Genesis Shepherd + Crystalline Crawler + Umbral Collar Zealot + Persistent Specimen

Prerequisites

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Steps

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

Effects

• Infinite +1/+1 counters on creatures you control
• Infinite colored mana
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite surveil