Cayth, Famed Mechanist, Crystalline Crawler, Cryptic Trilobite, and Pemmin's Aura

Prerequisites

• Cayth, Famed Mechanist on the battlefield
• Crystalline Crawler on the battlefield
• Cryptic Trilobite on the battlefield
• Pemmin's Aura on the battlefield
• Cayth does not have summoning sickness
• Crystalline Crawler and Cryptic Trilobite each have at least one +1/+1 counter on them
• available

Steps

1. Activate Cayth by paying and tapping it, putting a +1/+1 counter on Crystalline Crawler and Cryptic Trilobite
2. Activate Cryptic Trilobite's first ability by removing a +1/+1 counter from it, adding that can only be spent to activate abilities
3. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
4. Activate Pemmin's Aura's first ability by paying , untapping Cayth
5. Repeat

Results

• Infinite proliferate