Blood Oath (Marvel Universe)

Blood Oath is the nineteenth episode of the first season of Marvel Universe: Spider-Man.

Plot
Tombstone forces Michael Morbius to finish the super soldier serum quicker, since it has been taking so long, and due to a lack of test subjects, Michael is forced to test the serum on himself, and he adds in some bat DNA as well, but it goes terribly wrong, and he is transformed into a blood-thirsty vampire.