Crackdown Construct, and Illusionary Mask

Prerequisites

• Crackdown Construct on the battlefield
• Illusionary Mask on the battlefield

Steps

1. Activate Illusionary Mask by paying
2. Crackdown Construct triggers, giving itself +1/+1 until end of turn
3. Resolve the Illusionary Mask ability
4. Repeat

Results

• Infinitely large Crackdown Construct until end of turn