Can't use Moon Blade Dance in Dungeons

[SDWORC]

Hello, lv80 LK can't use MBD ever since I hit lv78~? and it's been pretty annoying idk if it's a bug or if I'm not meeting certain requirements because there's no prompt telling me why I can't use the skill, same with halfmoon slash except halfmoon slash can be used halfway through a dungeon as opposed to none at all, any help would be much appreciated!! thanks in advance because it's honestly making me not even want to play this game =/

[Rinkie]

It is because you have taken the ex version's of the skills that need bubbles to use. (HMS=5)(MBD=30) If you have your first class mastery then you can gain bubbles by using Cyclone Slash or by hitting enemies with flash stance. When you awaken you can get awakened eclipse and moonlight splitter, that you can use to also gain bubbles.

[SDWORC]

Oooh haha thanks bro, I haven't played in so long and came back and the levels came so fast I didn't even read the skills xD