Urza, Lord High Artificer, Words of Wind, Forensic Gadgeteer, Grand Architect, and Secret Door

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Words of Wind on the battlefield
• Forensic Gadgeteer on the battlefield
• Grand Architect on the battlefield
• Secret Door in hand
• available

Steps

1. Cast Secret Door by paying
2. Forensic Gadgeteer triggers, creating a Clue token
3. Activate Urza's first ability by tapping the Clue, adding
4. Activate Grand Architect's second ability by tapping Secret Door, adding that can only be spent to cast artifact spells or activate abilities of artifacts
5. Activate Words of Wind by paying , replacing the next card you would draw by causing each player to return a permanent to their hand instead
6. Activate the Clue by paying and sacrificing it, causing you to return Secret Door from the battlefield to your hand, and causing each opponent to return a permanent they control from the battlefield to their hand due to Words of Wind
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite storm count
• Return all permanents opponents control to their owner's hand