Crackdown Construct, and Outrider en-Kor

Prerequisites

• Crackdown Construct on the battlefield
• Outrider en-Kor on the battlefield

Steps

1. Activate Outrider en-Kor's ability
2. Crackdown Construct gets +1/+1 until end of turn
3. Repeat

Results

• Infinitely large Crackdown Construct