Crackdown Construct, and Lightning Greaves

Prerequisites

• Crackdown Construct on the battlefield
• Lightning Greaves on the battlefield

Steps

1. Activate Lightning Greaves's equip ability by paying , targeting any creature you control except the creature that has Lightning Greaves attached
2. Crackdown Construct triggers, giving it +1/+1 until end of turn
3. Resolve Lightning Greaves's equip ability
4. Repeat

Results

• Infinitely large Crackdown Construct until end of turn