Fūin no Brahma

The Fūin no Brahma, also simply called Brahma, is a powerful fūinjutsu seal that inhibits the body of a member of the Yoshitane family at birth and grants them immense power if they are proven worthy. Despite its requirements, this seal is not truly a kekkei genkai and can skip entire generations at a time. The latest person to possess its power is Kiyomori.

Appearance
The Brahma seal grows steadily on a person as they grow. At first, it starts as two black circles on the user's back. As they grow older and stronger, the seal grows as well, often wrapping around their shoulders, chest, and torso or going down their arms and stopping at their hands. Once the black seal, known as the Outer Seal, is complete, the user embarks on a mental and spiritual journey to unlock the seal's potential. If they fail, the seal fades away and never appears again. However, if they are worthy, various white, red, and gold designs appear on the Outer Seal until the entire black canvas is covered. The completed coloring is known as the Inner Seal.

Abilities
The Brahma Seal serves two purposes. The first enables the user to summon a plethora of objects from a separate dimensional plane using the seal as a medium. When sealed, the user can use the tool to deal a devastating attack, reduce or negate almost any attack, or provide great beneficial effects. However, the tool disappears within seconds or minutes, forcing the user to summon it again for additional use. These objects require a lot of chakra to summon and can be only used for a short while due to their great power. Prolonged use of artifacts require great amounts of chakra and focus.

The second use is merely enabling the user to create more devastating attacks with less powerful techniques. While the user may be able to use highly destructive techniques on their own, the seal borrows some of the sealed artifacts' power to bolster its damage output. However, this method requires great timing to utilize.