I won't spoil it outright, but I will say this about Chelsea's trump: you have seen it in Dark Messiah. At the time he used it, he basically telegraphed when it would be seen again.

And Mystic_Clown: Zombyra's backstory as seen in this story was originally made up for "Tilting the Balance". I made up something new because I did not like the manga version (and I hated those chapters).