Aether Storm, Avacyn's Memorial, and Leyline of Singularity

Prerequisites

• Aether Storm on the battlefield
• Avacyn's Memorial on the battlefield
• Leyline of Singularity on the battlefield

Steps

1. Aether Storm prevents any player from casting creature spells
2. Avacyn's Memorial prevents Aether Storm from being destroyed due to its ability

Results

• Players cannot cast creature spells