Iron Armour Seal

infobox This is the seal that keeps the Eight Tailed Giant Ox sealed inside Killer Bee. It would seem the tattoo on his shoulder which reads "Iron" is in fact part of this seal. He claims that Naruto's Four element seal is much higher quality than his own, but the exact differences between the seals is currently unknown. When viewing Killer Bee in his mind, there seems to be a black void where he freely interacts with the Tailed Beast, but whether this is an effect of the seal or the result of his training to tame the beast is also unknown.