Crackdown Construct, and Lancers en-Kor

Prerequisites

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

Steps

1. Activate Lancers en-Kor's ability targeting a creature you control
2. Crackdown Construct gets +1/+1 until end of turn
3. Repeat

Results

• Infinitely large Crackdown Construct