Putting an end to the carnival caused a dimensional crash-landing in the Land of Oz. That put the girls on the trail of the cause of the animal transformations — the Wicked Witch of the West — a title now taken by the ancient sorceress Circe.
Along the way, Beryl had a run-in with the Nome King, who gave her a very particular armor as a parting gift.
Unfortunately, a summoning during a "Protection against the Dark Arts" lesson goes awry, and Daleks from another timeline threaten to make a dimensional incursion. Fortunately Beryl springs into action, aided by the ever useful Grease spell.
This time her hands are manacled by the form-shifting Nome King armor recharging its magic, but of course this won't stop her.
The young Tengu girls from that clan saddled with looking after the hostage marvelled much at Beryl's magical "armor".