Dragon and God

Two gigantic beings faced off against each other. On one side was an Old God a powerful being that could manipulate some of the natural laws of the universe. At the same time, the other was a black dragon one of the strongest species of dragon that was not personally created by the ORIGIN but birthed from the mother dragon which was created by the multiverse itself. 

Despite being bigger than some planets from the lower planes the entire body of the Old God Gwydion was just the same size as the black dragon Tanith's head. Still, despite the size difference Gwydion stood proud and tall. 

"What are you doing here you lizard?"

"Heh, a puny god like you calling me a lizard." 

"You didn't answer my question, what are you doing here?" 

"I came to save the current incarnation of the Strongest Mortal Soul, so just step aside and leave. I don't really wish to ruin this reunion of him and me, so for now I will allow you to live."