Urza, Lord High Artificer, Forensic Gadgeteer, Sensei's Divining Top, and Cloud Key

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Forensic Gadgeteer on the battlefield
• Sensei's Divining Top in hand
• Cloud Key on the battlefield

Steps

1. Cast Sensei's Divining Top by paying
2. Forensic Gadgeteer triggers, creating a Clue token
3. Activate Urza's first ability by tapping the Clue, adding
4. Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top from the battlefield on top of your library
5. Activate the Clue by paying and sacrificing it, causing you to draw Sensei's Divining Top from the top of your library
6. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite storm count