New OC ?

Was once a member of the thirteen but felt outcasted and unknown by his brothers and sisters. He became the night bringer of Cybertron but no transformer knew of him as he was regarded as unknown or a myth or even something to feared. Hatred grew in his spark and he argued to Prima that he wanted to be treated as equally if Prima gave up the Star Sabre to him, but Prima denied his request then came a battle of light vs dark with the light winning and darkness fell. He became the moon of Cybertron and vowed his return, bringing vengeance to those who oppose him.

HINT : His symbol is a crescent moon, he is based of a MLP character.