"Insanity Mist," Sena explained, hurriedly. "It has a slight pinkish hue, and is distilled from a fey-touched flower found frequently in this region. Quite rare, very dangerous. Causes madness, visions, and can linger for weeks. Fills the entire room, so we'll want to keep moving back so it can safely disperse. Should take only ten minutes or so?" she said, herding everyone away from the tower - not that they needed much more encouragement after that description. (Nat 20 on her Nature check).<br/><br/>Sure enough, a faint, pinkish mist slowly filtered out of the tower, over the next few minutes, eventually fading into nothingness.