Kentaro, the Smiling Cat, Shrieking Drake, Urza's Incubator, and Rukarumel, Biologist

Prerequisites

• Kentaro, the Smiling Cat on the battlefield
• Shrieking Drake in hand
• Urza's Incubator on the battlefield
• Rukarumel, Biologist on the battlefield

Steps

1. Cast Shrieking Drake by paying
2. When Shrieking Drake enters the battlefield, it triggers, returning itself from the battlefield to your hand
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite storm count