Yasharn, Implacable Earth + Aether Storm

Yasharn, Implacable Earth
Aether Storm

Requires
Yasharn on the battlefield. Aether Storm in hand. 3u available.
Steps
  1. Cast Aether Storm
  2. Players can no longer cast creature spells, and Aether Storm can not be destroyed due to players being unable to pay life to activate its ability
Results
Players can not cast creature spells.