Shrike

Yeah, I started reading it about two years ago, I think, but then stopped after some twenty or so chapters for some reason.

It's a good manga. Balbadd arc was one of the best shounen arcs. Characters are pretty cool, and I actually find female characters one of the best. For example, Morgianna and Hakuryuu's mother, Ren Gyouken, are one of the best written characters in the manga. There are also more complex characters then your usual Shounen generally, few examples : Kassim, brother emperors of Balbadd, Mogamett, Sinbad, Hakuryuu, Dunya etc.

Some situations suffer from the horrendous shounen syndrome, unfortunately, where the faces of the "evil guys" are just drawn so because the reader should realize they are "evil", which sucks ass. The existence of black rukh also somewhat put me off because it's again black and white, but in the recent chapters black rukh is shown as something more than just an "evil power har har!", so it's getting better.

Edit : and it's actually cool that it isn't predictable at all. The Ugo being "killed" completely surprised me, for example. Although it's still a young manga compared to the "big 3", I see potential. At least it's already doing a dance of ruin all over Bleach's hide.