Next up is Devilman based on the manga by manga legend Go Nagai.
Long ago demons ruled the Earth, then a shift in the magical forces
forced them to go into hibernation thus setting the stage for the
dominion of the human race. Now the cosmic forces have shifted again and
the demons are waking up! The demons take over the bodies of humans and
mutate them into their own forms. To be able to fight the demons someone
must manage to retain control upon merging with a demon and
become...Devilman! Only one OVA is out so far and it is excellent! Be
warned! If the sight of blood, even animated blood bothers you then this
series is not for you!