Mikaboshi

Mikaboshi, said to be a myth, has been said to only be of possession of someone that has Senju genes in their bloodline. It is the mutation of the Amaterasu, and almost has the same abilities. The midnight-blue flames of Mikaboshi, which has been said to destroy anything in it, are most strongest when the stars are seen in the sky. Mikaboshi, however, unlike Amaterasu which burns in seven days and seven nights, only burns within four days and four nights, and in daylight are weak.

Trivia

 * Amatsu-Mikaboshi (天津甕星, "August Star of Heaven"), also called Ame-no-Kageseo (天香香背男, "Brilliant Male"), is a god of evil and of the stars, specifically the pole star