Bone tattoo was a tattoo of the Kikage Zumi. This Blessing of Hitomi was depicted as a pure white skeletal bone. Most often, this was seen as a skeletal spine and ribcage, a skull painted on their face, or in the most disturbing cases, the entire Kikage Zumi's body was adorned with art of their own skeleton. This tattoo granted a bizarre mastery of the undead, which could be commanded by the Tattooed Monk.