A peculiar artifact from Hell that, through an unkown mechanic, grants the user invincibility for a short period of time.
Reported side effects of the use of the object include a dramatic change in the user's vision, turning everything bright white. Research indicates some sort of physical change may take place in the eyes of the wielder, as their ocular orbs have been observed turning bright yellow, almost golden during use of the object. In any case, this effect disappears along with the invulnerability as the power of the artifact fades.
Interestingly, the Pinky Demon has similar glowing yellow eyes. While it is not invulnerable by any sense of the word, some connection may be implied.