An addition to these three swords that allows for them to "close" their blade and "reopen" them when unleashing a charge attack.

The two main ideas I have are these:
A) Cosmetic change that involves the sword's center opening to release deadly energy, closing back up again after releasing a small puff of smoke
and
B) Toggleable "second option" for these three swords that involves the blade staying open, dealing more swing damage rather than charge damage, and inflicting status on enemies through normal attacks rather than charged ones.