User blog comment:RoyallyBella/Official Season 7 discussion blog/@comment-25830140-20160403181947/@comment-2056915-20160407013217

Bloom shared the pieces with the Winx, but not transferred them. Daphne was the rightful owner of the Dragon's Flame, until she transferred it to Bloom, thus making her the owner. The Winx just received the pieces, which the main purpose of the "sharing" thing is helping them maintain their powers (via the ****** Bloomix power). And they are not rightful owners of the Dragon's Flame, either, so once they lose that pieces of Dragon's Flame, they can kiss their powers goodbye. As I said, all the transformations from Sophix to Tynix (and later ones) are "powers". Their current fairy level is just Believix.