 If you liked
Samurai Deeper Kyou
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 ...then you might like
Bastard!! Ankoku no Hakaishin
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They have a guy sealed in the body of another,to stop the person to make evil-doing.It's in both a before evil,anti-hero and a good guy.Kyo and DS also got unbeliable strong as the chapters passes,and have 4 people serving him as his personal army(in SDK the Shiseiten,in Bastard! the Shiten'ou).Also some characters are very similar like Akira and Kall-Su even in powers,and both characters have religious ligations.But I like Kall-Su much more than Akira.Oh,and both main charcter are part of a profecy.