Morophon, the Boundless, and Horned Kavu

Prerequisites

• Morophon, the Boundless on the battlefield
• Horned Kavu in hand
• "Kavu" chosen with Morophon

Steps

1. Cast Horned Kavu by paying due to Morophon
2. When Horned Kavu enters the battlefield, it triggers, returning itself from the battlefield to your hand
3. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite storm count