The Serum is a manufactered health item present in ObsCure.
The creatures generated by the Mortiflia Flower have special proteins than runs through their veins that makes their muscles more resistant.
Thanks to various enhancements of the syringe is possible to synthesize three different types of serum:
The Normal Serum, a light greenish liquid capable of giving a small energy boost.
The improved Serum, green liquid that, when drunk, is able to give a good energy boost.
And the powerful serum, the dark green liquid that can give a large amount of energy.