Cursed Seal of Moon (Nakuka)

The Cursed Seal of Moon is the strangest of all Orochimaru's cursed seals, claiming to have surpassed even the Cursed Seal of Earth and Heaven.

Appearance
Despite popular belief, the cursed seal consists purely of crescent moons with a single circle to make it seem as though the moons are creating a sun. The soft curves and sharp ends make it seem like a normal cursed seal, but the cells the seal covers are constantly dying, but Shizuko uses her chakra to heal it when it smells of death.

Creation
Orochimaru created this cursed seal on a whim, no past thought. When Shizuko wasn't breathing at birth, Orochimaru thought the pain of a cursed seal would get her screaming, and it worked.

Usage
There are two stages, but stage two is broke up into several sub-stages as Shizuko's clean chakra refuses to let stage two come out all at once.

Stage One
Stage one is triggered by extreme anger or sadness and pours in small doses. With every new inch of skin the seal covers, the stronger she gets, the stronger the illusion she makes, the further her shield widens. It's uncontrollable, and the shield blocks even those she doesn't wish to protect, forcing her to use more of her natural chakra. It leaves her exhausted for two or three days.

Stage Two-point-One
The first point is triggered by a mix of betrayal, anger, and sadness, and comes full blast, with no control. Her skin warps until it's a grayish-blue tint, and scales pop up around her arm, legs, and throat, forcing her main appendages to fill with the dark chakra.

The powers remain similar to those of Stage One though more muted given the extreme emotional whirlwind going on inside her. She's exhausted for about a week after falling into this edge of the stage, and can't use her chakra for that same amount of time.

Stage Two-point-Two
The second point is triggered by pure anger, and comes slowly, savoring its movements as her scales push out further, covering her with snakes. Her skin is literally made of snakes at that point, and venom drips from every one of them, aiming for any, not within her bindings. Her tongue stretches without the need of chakra and is slit.

Her strength weakens, but her illusions exceed levels she had no idea were possible. Her shield only covers those she's bound to and the people they care about. She can also block off any eye techniques as she awoke the Eye Against Power. Orochimaru thought about everything other than the aftermath of these powers. Once done - it can last up to forty-eight hours if need be - she will remain immobile for at least a week, but the likelihood of it taking such a short time is unlikely. An entire month is a better estimate.

Stage Two-point-Three
The third and final part of this stage, and the entire seal is triggered by the person housing the seal's own choice. Once strong enough to hold it under control, this stage activates when need be. Unless they have the injection Kabuto and Orochimaru created to automatically for Shizuko into this stage. Shizuko can transform into a snake herself, fully, unlike Orochimaru's Slithering Snake Mode; capable of illusions, shields, and forbidden ninja techniques not easily mastered through simple training, but by force. Smaller snakes surround her, fending off anyone who dares come near unless they are bound through her seal or her true heart. After this, the likelihood of her being able to use chakra again is slim. It's her ultimate offense, and the risk is higher than most.