Blossoming Tortoise, Crackdown Construct, and Mishra's Factory

Prerequisites

• Blossoming Tortoise on the battlefield
• Crackdown Construct on the battlefield
• Mishra's Factory on the battlefield

Steps

1. Activate Mishra's Factory's second ability by paying , causing it to become a 2/2 Assembly-Worker creature in addition to its other types until end of turn
2. Activate Mishra's Factory's second ability by paying
3. Crackdown Construct triggers, giving itself +1/+1 until end of turn
4. Repeat from step 2

Results

• Infinitely large Crackdown Construct until end of turn