Aether Storm + Avacyn's Memorial + Leyline of Singularity

Aether Storm
Avacyn's Memorial
Leyline of Singularity

Requires
All permanents 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.