For your pleasure and entertainment, here we present, thirty fiendlings seasoned with a whiff of brimstone, teasingly clad in shadow, accompanied by tunes played on pipes of angel-bone; likewise do we tell of the gifts they might bestow upon one in their favor.
So get them before Hell freezes over!
A powerful wizard that the PCs encounter is completely silent. He does not speak and cannot be heard as he moves. Even his spells are silent, but his magic is just as potent.
He has a tendency to summon invisible chairs, place foes in invisible boxes of force, and other "mime tricks".