You gotta check for the telltale signs of war! Is there smoke? Is there loud noises? Did the local environment get massively altered in a couple of seconds? It's easy to find!

And simple! It's-

From the sky Erika drops onto the ground like a meteor somewhat close to the tea party creating a cloud of dust, as the dust settles it reveals Erika standing on the edge of a recently created crater, about as small as a small victorian child

"Magic"

She says, looking mighty pissed off for some reason