Well, for now. We just need to wait for the next volume xD
Tough may there is a lot opinion in this case. Well that's just what i tough, so don't be mad
If i remember it right. Pandora's spell require a complete god as a sacrifice right... And circe is literaly "half" . I think it's the same as in the fight with sun wukong, neither of them got an authority. That's why i though he didn't get an authority, but some power up