Evolution Witness, Jukai Preserver, Crystalline Crawler, and Zirda, the Dawnwaker

Prerequisites

• Evolution Witness on the battlefield
• Jukai Preserver in hand
• Crystalline Crawler on the battlefield
• Zirda, the Dawnwaker on the battlefield
• available

Steps

1. Activate Jukai Preserver by paying and discarding it, putting a +1/+1 counter on Crystalline Crawler and Evolution Witness
2. Evolution Witness triggers, returning Jukai Preserver from your graveyard to your hand
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
4. Repeat

Results

• Infinite +1/+1 counters on Evolution Witness
• Infinite self-discard triggers