Billions of scarlet spheres flowing amidst the viscous crimson liquid collided with the acid designed to digest food.
Inside each sphere, there was a dark, lifeless core that had long ago lost all of its power, but... was still a quality material that one had to know how to use.
The outer shell of the spheres burst, allowing the cores to disappear into the flesh, literally becoming part of the body. However... always it led to only one result - inevitable death because even the drained blood of a monster was too dangerous for a normal person.
Though, even the Phantoms were not able to hold the monsters' energy inside them or interact with their blood or flesh in any way.
The only and most important difference between ordinary humans and Phantoms was that Phantoms could get rid of foreign energy or even suppress it for some purpose as in the case of regenerative monsters.