Fervent Champion, and Crackdown Construct

Prerequisites

• Fervent Champion on the battlefield
• Crackdown Construct on the battlefield

Steps

1. Activate the equipment's equip ability by paying , targeting Fervent Champion
2. Crackdown Construct triggers, giving it +1/+1 until end of turn
3. Resolve the equipment's ability, attaching it to Fervent Champion
4. Repeat

Results

• Infinitely large Crackdown Construct until end of turn