Kāma

The kāma is a mark that takes the shape of a black diamond on the user's hand. Although unfamiliar to the population at large, Kara has knowledge on it and similar seals.

So far, Boruto Uzumaki, who received the mark after defeating Momoshiki Ōtsutsuki and Kawaki, who received it through unknown means are the only known wielders.

Usage
After unconsciously activating it, Boruto was capable of absorbing ninjutsu. As it was his first time accessing the mark's power, it made him collapse afterwards. Three years later, however, he could activate it at will.

Trivia

 * Although the kanji itself would normally be translated as, the furigana indicate the reading . "Kāma" means "wish", "desire", or "longing" in Hindu literature. In Japanese it is also an uncommon way to write "karma".

pt-br:Kāma Karma