After a smaller amount of bloodline essence had been injected, the Abyssal runes on Bruce's bones began to take effect, gradually absorbing the power and transforming them.
After waiting for more than half a day, Bruce was still in good condition.
The transformation of a Lesser Demon was bound to take longer than that of an apprentice-level imp.
Charles had even prepared himself for it to take three to five days.
Once Bruce had absorbed this portion of the demonic bloodline, Charles began the next step.
He went to the Minotaur Demon and cut away portions of its internal organs.
Charles connected these organs to Bruce's body.
He used the Blood Abyss Resonance Spell to further fuse them together.
During the procedure, Charles also poured a new bottle of potion into Bruce's abdomen to help him complete the fusion more steadily.
Finally, after waiting a day, Bruce was still in good condition.
Now Charles began the most critical step: he cut out the Minotaur Demon's heart.
The heart was the source of a demon's power.
Some powerful demons were said to have two or even three hearts, but an ordinary Lesser Demon had only one.
Charles condensed all the Minotaur Demon's remaining bloodline essence into its heart.
That way, each time the heart pumped, it would send this power through every part of the body.
He removed Bruce's heart and temporarily constructed a false one with his mental energy, allowing blood to continue circulating to every part of Bruce's body.
Once everything was ready, Charles placed the Minotaur Demon's heart where Bruce's heart had been.
As the Minotaur Demon's heart entered Bruce's chest, the bloodline essence began to flow into his body.
It entered his blood vessels and, carried along by the flow of blood, spread to every corner of