Scarlet's Game Room
I know of 6 creatures that drop Blue Ghost. There could be more, I don't have the scoop on ALL the bosses out there yet. I been trying to get Esmee to do my work for me - uh, I mean HELP me, but I haven't had much luck yet.
Akilles' Tower, Wizard City
Ghost hasn't filled this in yet.
Noxious Gas Golem
Main Hall, Marleybone
Sir Claudas D'Agrodolce (Tier 5)
Grand Tourney Arena (Tier 5)
Sir Steffan BadApple (Tier 3)
Grand Tourney Arena (Tier 3)
The Woman's Right Hand
Savvy hasn't filled this in yet.