He looked away and crossed his arms, trying to recall what happened one-thousand years ago.
"The poison had already taken your vitals when I caught up to you, I couldn't do anything. Not even Elazul(*))could cure it. " His eyes widened, then he relaxed, closing his eyes. "I remember.. that was the day I meant Rath(**). I ended up chasing him across half the world, it was then that we fought, and he beat me pretty badly. He then decided to try and take my mind, but my mind was stronger.. and I did the only thing I could, I sealed him away within my own mind.."
Corona sighed, those were pretty bad days for him. How many people had been slaughtered when he lost control of Rath.. he didn't know..
"Rath eventually broke free. But not only that, he turned against Satan. He actually rounded up his own team of demons and attacked Hell. The Material Plane went haywire and the humans became even more corrupted than they already were."
(* Elazul is another Arch-Guardian, similar to Corona. Elazul is much older, however, and is/was Corona's best friend and mentor. Arwen would have met him a few times, as well.
** Rath is short for De'Rathazamazillion, a powerful greater demon and one of Satan's lieutenants. Throughout Corona's story, he was the major enemy. At one point, he breaks away from Satan, believing that he should be lord of darkness. A three-way fight began between him, Hell, and Heaven. This left a great scar on the world and caused humans to become alot more corrupted than they already were, resulting in the world as it is now)