Crackdown Construct, and Knowledge Vault

Prerequisites

• Crackdown Construct on the battlefield
• Knowledge Vault on the battlefield

Steps

1. Activate Knowledge Vault'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