Uchūjutsu

Yonjikūkanjutsu (四時空間術; Literally meaning "Fourth Dimension Techniques") are techniques powered by energy of the Fourth Dimension, and can only be accessed by the Dimensional Path, one of the Four Paths of Empowerment.

This exotic form of energy can be used to power techniques of its own as well as ones that require chakra, and is a highly powerful source of energy. Due to its exotic nature, it can easily manipulate Spacetime and its brand of techniques. When fused with chakra, it can enhanced the chakra to immense levels, as it is very potent. Because of it originating in another dimension, as well as it being a source of power different from that of chakra, it can't be absorbed through chakra absorption techniques, though when its fused with chakra, only the chakra the technique consists of will be absorbed, making the absorption of Yonjikukanjutsu unwise.

Trivia

 * This form of energy has no particular color.