I'm a Hellhound with gray fur, white hair, and red glowing eyes standing before you. It's bad enough that you found yourself within my presence, but now it's about to get worse for you as things escalate.
I growl; bearing my teeth and growing all the more ferocious as a magic glow briefly envelops my body. Once it fades two additional pairs of smaller red eyes open just below regular eyes, giving me six all together. But that's just the start of my transformation.
My body grows much larger while my bipedal posture morphs and contorts from a biped to a quadruped giving me the proportions of a canine with messier fur, bigger teeth, and bigger claws. My clothing also magically changes; my choker disappears while my tattered crop-top and shorts morph to accommodate my new appearance. My black fingerless gloves and black thigh-high toeless stockings, stretch out on my front and hind digitigrade legs allowing my black claws to protrude.
I'm now much bigger; even bigger than a regular full grown wolf. I'm way more ferocious and feral as well; no longer talking like a person and instead growling and snarling like a beast as I continue to show my teeth as I keep my eyes on you.
My body tenses up, my tail stiffens, my ears flatten, my legs bending, and the hairs on my back rise. I rear back, ready myself to pounce on you...