Zirda, the Dawnwaker, Gemstone Array, and Crackdown Construct

Prerequisites

• Zirda, the Dawnwaker on the battlefield
• Gemstone Array on the battlefield
• Crackdown Construct on the battlefield
• available

Steps

1. Activate Gemstone Array's first ability to put a counter on it
2. Activate Gemstone Array's second ability to add
3. Repeat

Results

• Infinitely large Crackdown Construct