Little is known of the strange creature known as the Mothman. The supernatural being seems to be a harbinger of disaster. According to the lizardfolk tribes of the area, the Mothman is an ancient being that existed in the time of their earliest ancestors. It exists to make sure that destiny is fulfilled.
AC 3  HD: 5 Attacks: Claw (1d6) Move: 18 (fly)
Once per day the Mothman can cast any spell to make sure that fate is unaltered. In addition, it's presence is so unnerving that anyone attacking it must make a successful saving throw to do so.
More information of the Portsmaw setting can be found here.