User blog comment:Taxidriver256/Skin to win/@comment-5663427-20140315105947/@comment-8919271-20140315120937

And his W has a sound effect when it has 3 stacks.

Too bad it all doesn't matter, as good Varus will hit his Q and R anyway, they both have sound effects so you can hear then even if you can't see, and his W can't really be heard in teamfights.