At the time, Charles and Qiaosuo understood nothing.
Now that Charles had studied the Abyssal Grimoire, he had gained a different understanding of the rune array they had drawn back then.
Charles had drawn that rune array twice. Originally, he had simply copied the runes from the parchment.
But now, Charles could reproduce it directly.
However, reproducing that rune array held little meaning, because the runes on the parchment were filled with all manner of ambiguous symbols.
The fact that they had managed to summon Delis had been full of dramatic coincidence.
Even when Charles and Qiaosuo had summoned Delis on the ground, the spots where they stood had been the locations of the hidden sacrifices.
Old Charles and Qiaosuo had not died unjustly.
But being unable to reproduce that rune array did not mean Charles could not improve it.
With that thought, Charles decided to make an attempt.
He cleared away some of the runes on the ground array, then inscribed new Abyssal runes in their place.
These runes possessed stronger protective effects, while also being more precisely targeted.
The rune array's final summoning target was the Succubus Delis.
In theory, Charles could not summon Delis, because his level was too low.
Delis was a Lesser Demon. According to Loran, she was equivalent to a first-circle or second-circle wizard.
But sometimes, simple theory could not be relied upon.
Back then, Charles had still been an ordinary person, yet he had been able to summon Delis's projection. That showed Delis had mastered a method of weakening her own power so that even mortals could summon her.
Or rather, Delis had responded to the summons not because she wanted to be summoned, but because she wanted to eat the sacrifice.
Charles altered the runes in the original array that were unfavorable