You can raise zombies using the Bone Whip but only works on humanoids (prisoners, guards, bandits, etc) but few don't count such as goblins. Though be aware, they will be killed by guards at the entrances of each town, so take the back exits (such as the sewer exit or the slum exit)how do i bring a zombie to osiris for the cult quest? i befriended the bandits and now i can't use them XD
On the side note, May is a tough month.