Iron Spider, Stark Upgrade, Voltaic Construct, and Cryptic Trilobite

Prerequisites

• Iron Spider, Stark Upgrade on the battlefield
• Voltaic Construct on the battlefield
• Cryptic Trilobite on the battlefield

Steps

1. Activate Iron Spider by tapping it, putting a +1/+1 counter on each artifact creature and/or Vehicle you control
2. Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding that can only be spent to activate abilities
3. Activate Voltaic Construct by paying , untapping Iron Spider
4. Repeat

Results

• Infinite +1/+1 counters on artifact creatures you control