Blossoming Tortoise, Draconic Destiny, and Mishra's Factory

Prerequisites

• Blossoming Tortoise on the battlefield
• Draconic Destiny in hand
• Mishra's Factory on the battlefield
• available

Steps

1. Activate Mishra's Factory's second ability by paying due to Blossoming Tortoise, causing Mishra's Factory to become a 2/2 Assembly-Worker artifact creature until end of turn
2. Cast Draconic Destiny by paying , attaching it to Mishra's Factory
3. Activate Mishra's Factory by paying due to Blossoming Tortoise, giving it +1/+0 until end of turn
4. Repeat step 3

Results

• Infinitely powerful Mishra's Factory until end of turn