Scorpion's Tail Dōjō

The Scorpion's Tale School was a shinobi school of the Scorpion Clan. Once one of his sensei became corrupted and her clan leaders determined her unfit to continue as a shinobi. The shinobi retirement meaned execution by her own students, but she killed every single person in the dōjō and escaped to eradicate nearly all of the school's remaining practitioner. The Scorpion's Tail techniques were lost for several centuries.