Translations:Runes/18/en
From Brave Nine Wiki
Rank-Up
5★ and 6★ +9 Runes can be ranked up to higher grades by using 10 Runes of the same star rank and grade/rarity as the rune to be ranked up.
5★ and 6★ +9 Runes can be ranked up to higher grades by using 10 Runes of the same star rank and grade/rarity as the rune to be ranked up.