Crackdown Construct, and Flowstone Hellion

Prerequisites

• Crackdown Construct on the battlefield
• Flowstone Hellion on the battlefield

Steps

1. Activate Flowstone Hellion's ability
2. Hold priority and repeat this an arbitrarily large number of times
3. Resolve the Crackdown Construct triggers, making Crackdown Construct arbitrarily large

Results

• Infinitely large Crackdown Construct