User blog comment:FabCassandra/Winx Club Bloom Full Bloomix & Mythix Preview/@comment-24458850-20140212165620/@comment-2140385-20140212171250

Maybe the wands will allow the Winx to obtain the Mythix power and that picture is from the episode where the Winx will obtain Mythix and they first get the wands to unlock Mythix.

The Season 6 spoilers say that the Winx will have to find the key to close the Legendarium forever. Maybe the wands are the keys that will close the Legendarium forever.