Soft Heart

Ninjago AU before Ninjago and the other Realms were made. The Overlord, actually named Astro, lived in the darkest and most destroyed part of the universe (probably thirty ions before he became the overlord) along with other dark dragons. While Soft Heart, the third son of The King of the Mother Star (the brothers are Blue Talon and Spark Fang), lives in/on a shining blue star in the center of the universe. The dark and light dragons have been fighting since three Eons after the universe came into existence, and if a dark dragon got into the Mother Star everything would "end". Soft Heart meets Astro, on one star-rotation, where you continue the story as Astro.