Aurora is the Major Fairy of the North and possesses the power of ice, like said byTecna in Episode 22 of Season 4.
Her source of energy, which is called "The Blizzard", has the icebergs inside a big crystal ball which is protected by herself (and maybe by her Artic Fairies, too). It's strong enough to freeze the whole universe like said by her. It's could possibly be melted by Bloom's Dragon's Flame, but it's unknown if that's true or false.

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List of Winx Spells 2.0
FantasyList of Winx characters from the Winx series with magical powers and magical abilities and spells. NOTE: Not all characters have magical powers/abilities/spells and will not be used; new characters in Season 6 will not be complete until end of seaso...