Tough Luck (S02E09)

Charmcaster, Hex's niece, sneaks into the underground prison where he's confined to free him from his cell. With her assistance, Hex regains much of his power thanks to the magical staff she provides. Meanwhile, Ben, Gwen, and Grandpa Max attend a magic convention in Las Vegas. While there, Gwen discovers the famed Keystone of Bazell, which allows her to tap into the abilities of Lucky Girl once more. However, her excitement is short-lived as she learns that Hex and Charmcaster are also after the Keystone.