Unfortunately, yes. She absorbed element bearers from the future...most likely this Equestria's future...and with it, she obtained their ability to wield the elements. She apparently absorbed that future, too.
(Twilight sighs.)
I'm sorry, Fluttershy; I know this must be a lot to take in...
no subject
(Twilight sighs.)
I'm sorry, Fluttershy; I know this must be a lot to take in...