Vampirella / Dejah Thoris (Vampirella / Dejah Thoris #2)

Forbidden to modify Heliumite technology to try and save the dying planet of Drakulon, Vampirella and Dejah Thoris decide to navigate the River Iss and petition the goddess Issus for aid. It's a dangerous journey, and with thousands of blood-hungry vampires currently on their way to Barsoom, there's no time to lose!