In the Norse faith, ravens are considered sacred, the most enigmatic ones are Huginn and Muninn, a pair of ravens that served as messengers to Odin, the All-Father.
They would whisper to him all the things they had seen and heard. Ravens, according to ancient beliefs, are birds of carnage and blood, but also of wisdom and intellect.
Therefore, this symbol represents both ferocity and enlightenment. The words "Huginn" and "Muninn" literally mean "thought" and "memory"