[Lucy's POV: ]
The maxed level of [Grade-4] skills are usually called Divine skills, and after some really powerful Zero skills, they were the most powerful abilities one could have in this Worldline.
That much we knew clearly.
Then, what was a divine 'series' skill?
Was there a series of some particular divine skills like the ones we just got that could be considered so special that they have to be categorized entirely independently?
"They are only known among a few of us, however, the divine 'series' skills or as some of us call them, the [Ultimate skills] a peculiar kind of skills stored in the runestones like the ones you have just got.
And, according to some stories, they are very different from any kind of skills in the great Worldline."
"Ultimate skills…?"
"What kinda stories?"
