So eventually, the use of the Keyblade could die out, if Masters do not perform this rite, or if students are unable to learn the rite to perform it.

[Celestia isn't quite certain exactly what ratio of concern for their current situation to personal curiosity is inspiring her questions, but so long as Master Eraqus is willing to speak, she intends to keep inquiring. At the very least, if Keyblade-wielders travel between worlds as a rule, she may one day find herself dealing with one in the waking world.]