Lonis, Cryptozoologist, Shrieking Drake, and Urza, Lord High Artificer

Prerequisites

• Lonis, Cryptozoologist on the battlefield
• Shrieking Drake in hand
• Urza, Lord High Artificer on the battlefield
• available

Steps

1. Cast Shrieking Drake by paying
2. Shrieking Drake enters the battlefield, triggering itself and Lonis
3. Resolve the Shrieking Drake trigger, returning it from the battlefield to your hand
4. Resolve the Lonis trigger, creating a Clue token
5. Activate Urza's first ability by tapping the Clue token, adding
6. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite storm count
• Infinite tapped Clue tokens