At this moment.
Charles, meditating on Ship Island, suddenly opened his eyes.
He frowned as he sensed the surroundings.
At that moment, he detected a tremor coming from the Succubus body.
Though he did not know the reason, Charles immediately transformed his body into a Succubus within the meditation chamber.
The instant he changed, he realized where the tremor came from.
It came from the special spell-like technique in his bloodline: Summon Demon.
Demons could use this spell-like technique to summon other demons. Likewise, they could also be summoned by other demons through this spell.
Charles frowned. "I haven't summoned a demon, which means I'm being summoned?"
"Who the hell can summon me?"
"I'm not even a demon. How could I be summoned?"
But then another thought struck him.
"No, why am I not a demon?"
"My bloodline power is already that of a mid-rank male Succubus. The bloodlines of other Succubi might not even be as pure as mine."
"I'm a pure-blooded Succubus, just not in the Abyss."
"Then the question is, who summoned me? Other demons?"
As Charles pondered, he suddenly recalled that on the day of his advancement, he had tested it out by casting a summoning scroll into the void.
"No way, no way—did I really hit the jackpot in one shot?"
With that thought in mind, Charles followed the guidance of his bloodline and answered the summons.
In truth, Charles's guess was not quite right.
Whenever Abyssal demons had spare time, they would toss scrolls meant to summon themselves into the void.
However, limited by their knowledge, not every demon's scroll was effective.
Likewise, not every unlucky fool who picked up such a scroll could correctly perform every ritual and symbol written upon it.
Yet the symbol representing the Abyss was the most conspicuous and