Dan Abnett 
Vampirella vs. Red Sonja Collection [PDF ebook] 

FANGS MEET BLADES AS TWO TITANS CLASH! It’s the epic showdown we’ve all been waiting for- masterfully orchestrated by writer DAN ABNETT and artist ALESSANDRO RANALDI! Both Vampirella and Red Sonja were originally recruited by the Project, a cosmic collection of superheroes sworn to protect all known universes. But Vampirella is now considered a murderous criminal, and she’s capable of defeating any hero. Unfortunately for her, Red Sonja is no hero — the result is a universe-spanning, action-packed battle royal from start to finish! Collects issues 1-5.