The simple answer is that I reach out to the shadow, and shape it. It's less simple in the doing, though.

[the cat dissipates and the shadows return to their places]

I'm a shapeshifter. Or I was, before Asgard. We think it makes it easier for me. I do try to help people with it, though. That's what Merlin's Teacher's Council is about.

It's best to start small, though. Like this.

[she holds up her hand, casting a shadow on the floor. after a moment, its fingers wiggle and wave, while hers remain still]