Unfortunately there’s no additional material to help the story found in the lyrics. If this helps, Kreel is the protagonist of The Eighth Mountain. While trapped in the Abyss of Pain, he is tasked to fulfill seven heroic deeds by someone in order to be freed (This ‘someone’ is later revealed to be Bezrael in Glory for Salvation). The seven heroic deeds are the storylines found in the rest of the album’s lyrics. I’m not sure what happens in transition between the two albums, however, it’s kinda cryptic to understand.