Four Violet Flames Formation

This technique was first, (and only,) seen used by the Sound Four to create a sealed-off, box-like barriers with themselves placed at the barrier's corners. So long as the Sound Four are unharmed, the barrier does not allow anyone to enter or exit, but will not prevent additional help and aid from being brought in via the Summoning Technique. Those who come into direct contact with the barrier burst into purple flame and die instantly. In order to prevent those trapped within the barrier from attacking them, the Sound Four create secondary barriers surrounding themselves.