Burkhan-Luu A God

When you collect all nine legendary dragons' hearth and merge them then you can summon god of dragon greated by Hakieton, the hasband of goddess Alita in magical Isekai world of Glory Hearth that Goddess Alita and Hakieton created it. All nine legendary dragons are Hakieton's favorite creation. Drogon god can make you king of all dragons, since find one heart of that dragon make king of that kind, for example if you find hearth of legendary red dragon then you can become king of all red legendary dragons but only person who can meet Dragon god "Burkhan-Luu", mean you collected all nine hearth of legendary nine dragons