Ibitsu's Juinjutsu

Ibitsu has placed a cursed seal of his own design on his neck, which activates when he is attacked from behind at his blind spot. It acts as a powerful barrier which can be placed upon a part of the body and it activates when an attack reaches the point where it is cast. When the attack hits the barrier, a hexagonal shape appears. It is powerful enough to withstand a point-blank attack of any caliber. He can use this three times before having to re-apply the seal.