Cursed Seal of Sakon and Ukon, second level - the next stage of the forbidden mark that transforms the brothers into oni demons. The skin becomes red, the irises yellow, the sclera black, and black curved markings spread upward from the corners of the eyes. The nails lengthen and sharpen, the lips blacken, the mouth extends to the ears, baring fangs. The hair grows to the waist and becomes white, the chins stretch out, and on each forehead grows one long horn, but on opposite sides. On the arms and legs the skin hardens, turns black and becomes scales, forming a semblance of spiked armor.
In this form, Sakon and Ukon are capable of breaking down their own body into molecules and penetrating inside the opponent. Once inside, they can alter the cells and proteins of the victim, effectively killing them, and then exit and restore their own body. The main drawback is that they receive the same damage as the body they have invaded. This was demonstrated when Kiba wounded himself with a knife, and Ukon felt the same pain. As with the other cursed seals, the transition to the second level greatly increases the user's characteristics, as well as their techniques.
After resurrection, experiencing intense hatred and rage, the brothers could draw additional power from the seal, which allowed them to perform super-fast merging and splitting of their kekkei genkai.
