Urza, Lord High Artificer, Words of Wind, Forensic Gadgeteer, Grand Architect, and K-9, Mark I

Prerequisites

• Urza, Lord High Artificer on the battlefield
• Words of Wind on the battlefield
• Forensic Gadgeteer on the battlefield
• Grand Architect on the battlefield
• K-9, Mark I in hand or in the command zone
• plus commander tax, if applicable available

Steps

1. Cast K-9 from your hand or from the command zone by paying plus commander tax, if applicable
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 K-9, 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 K-9 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