Arthur had killed many vampires, and although their blood essence flew toward him, he was no longer getting mad! It turned out the second part of the inheritance only had one technique, the one to control the madness, and the rest was only good memories the Blood Monarch had, meaning it was an inheritance Arthur could fully possess without the help of Ikarus.
Now with his new technique, which was a chant spoken in an unknown language, which created a Blood Rune on Arthur's body, making it so that he did not go mad, it was easy for him to fight as the worries of turning insane were gone!
Arthur and Valethar destroyed the vampire army until the point where only the rank three vampires remained, and those would be harder to kill.
A blood spear flew, piercing through Arthur's left leg, hindering his movements, and making it bleed like a waterfall. Valethar looked at him and said, "are you okay? These are strong vampires, it seems."