Cursed Seal of Lightning

Appearance
The Cursed Seal pf Lightning has a very unassuming appearance, that of a simple black lightning bolt. Upon activation, the seal spreads out to cover the bearer's body in the same Lightning Bolt shape as that of the seal itself, dominating the face, especially the eye area. The sclera turns black, and the iris yellow.

In the second state, the user completely transforms, now resembling a demonic beast of the night. In a sign of elegance, the bearer's hair is lengthened and turned a bleached blonde. Mirroring this, rough claws and vampiric fangs edge out from the fingertips and mouth as a dark, midnight blue skin tone is adopted. Six large, black-feathered wings emerge from the bearer's back, a mocking relation to the mystical six-winged Seraphim in Christianity and Judaism.

In a third state, the user adopts a very animalistic appearance. The user's hair is turned black as any darkness and lengthened to the waist, becoming wild and feral. The eyes turn completely black as an emblem of the Lightning Seal appears on their chest, shining through any clothing they wear, glowing with a malevolent, purple light. Claws are extended further, like a tiger's. The black wings become a shining red. The dark blue skin is lightened, revealing tiger-style stripes on the throat, face, and limbs.

Powers
In the first state, the user is granted a tremendous burst of speed, as well as their reflexive abilities. The user receives a modest increase to chakra and physical strength as well. If activated at night, the user receives a large stamina increase, and this boost is even greater in the light of the moon.

In the second state, a bearer's abilities are increased again along the same lines. At night, the user automatically blends into any shadow with a passive camouflage due to their dark skin. They also gain the ability to fly. The bearer has the ability to use his seal to gather an excess amount of chakra in his body and release it all at once for a high-speed dash.

In the third state, the user receives the same boosts again, as well as a strengthening of any symbiotic weaponry. They gain the ability to expel chakra from the symbol on their chest, as well as regenerate a severed limb, harden their body, and use their blood to stimulate chakra flow, giving a further boost.

Side Effects
The primary drawback is sheer physical fatigue. Because the human body can't stand up to the physical performance of the seal, it requires a person in extremely good shape to be used properly. For some reason, usage of the second and third states seems to render a person soft-spoken while in those states; indeed, the third state makes the user completely mute.