Crackdown Construct, and Mirror Entity

Prerequisites

• Crackdown Construct on the battlefield
• Mirror Entity on the battlefield

Steps

1. Activate Mirror Entity by paying
2. Crackdown Construct triggers, giving itself +1/+1 until end of turn
3. Hold priority and repeat from step 1
4. Resolve all Mirror Entity abilities

Results

• Infinitely large Crackdown Construct until end of turn