@Yagami_Light there are a total of 9 unique runes, and a person can theoretically have all the nine runes however it places a burden on their souls as those rune skills are extremely powerful
And a single unique rune skill can be obtained by a single person and until and unless they died no other can have that skill
And a single unique rune skill can be obtained by a single person and until and unless they died no other can have that skill