From MC's perspective:
The following day,
Sitting cross-legged in the training room. I took out the Class-5 Monster core and held it in my palm. This one monster core was enough for me to sustain a few hours of cultivation.
Then I closed my eyes and started to run the blood element method. As I recite the words, the blood rune in my mind starts to flicker.
The next moment, I felt suction in both of my palms and began to absorb the monster's core energies. The energies of the Class-5 Monster were more violent than the Class-4 Monster.
So I began to guide the energy slowly. As the energy flows through my veins. I felt the violent nature. But that was for a moment.
As I circulated the blood, a red light appeared above the bloodstream. Then they start to absorb the monster's core energies and then convert them into the mysterious white energies.