After killing all three mid-rank B demons, Daniel naturally received Exp. But that wasn't all:
[ You have reached the maximum amount of Exp you can receive. ]
[ You cannot receive any Exp until you reach Rank B. ]
He had met one requirement for Rank B: the required Exp amount.
Now only the second requirement remained—breaking the dimensional barrier. Awakened beings below Rank B and above Rank B (and Rank B itself) come from different dimensions. To reach Rank B, you need both the Exp and to break through that barrier.
How? Daniel didn't know. He'd only heard it happened in life-or-death battles.
Right now, his only opportunity was to fight the Noble Demon—maybe that would break the barrier.
He then took three drops of his blood and let each drop fall on one of the mid-rank B demons.
[ Creating three new Fallen… ]
[ New Fallen successfully created. ]
Suddenly, a light appeared from the sky, enveloping each corpse. Soon it faded, revealing their new forms.