Now that you have a moment to take it all in, the changes you've already undergone become obvious. You've shot up from your normal 5'4" to a full ten feet in height, and gained a few hundred pounds along the way, a lot of it muscle. Your skeleton has grown massively to support the new bulk, enormous pillars of bone and cartilage turned supernaturally strong by the magic that's seeped into your being. It's a hell of a confidence boost.
Your skin has been similarly enhanced, now a grey durable hide that's already let you punch right through glass without a single scratch. Yet when you bring your free hand to feel it, you find the skin supple and warm, tough as it may be. It thickens up at your joints now, darker grey patches marking your knees and elbows, the wrinkles dancing as the muscles move beneath. It's strangely beautiful, and as you distractedly test your new joints you accidentally tighten your fist on your captive's neck, drawing a startled yelp from him. He shoots you an irritated look as you smile nervously and apologetically set him down on the ground. It's not like he poses much of a threat right now. He snorts indignantly, a trickle of blood flowing from his nose. Something in the back of your mind tells you he's just being dramatic, and that his unnatural healing powers are already fixing whatever damage you've done. In fact, the surge of knowledge informs you, your new body has that same power should you ever need it, though as tough as you are now that's unlikely.
The changes, though slow, continue to roll through your body. Each breath you take is deeper and more expansive than the last, your chest rising and falling as the bones of your spine become a near indestructible column, stronger than any mortal bone could ever be, making your two-legged elephantine body possible at all. You feel your now gigantic heart thump with a nearly audible force, pumping gallons of blood with every beat, pushing magic and oxygen through your circulatory system as if they were one and the same. Your pelvis widens and bulks up, creaking with the strain of your weight, though it feels strangely hollow for some reason. You feel an odd wriggling sensation at the back of it as your tailbone unfuses from itself. It splits and narrows, snaking out above your now massive backside inch by inch, wiggling as your mind wires it up to your nervous system. It stops growing at a bit under a foot long, sprouting a brush of black hair at the tip that tickles as you wave your new appendage curiously. You roll your shoulders as you test out your new muscles, getting a feel for how this form moves. It's surprisingly flexible, and the wellspring of knowledge at the back of your mind assures you that you can still do everything you could in your old form, which it notes was much weaker than you are now. Seems your inner tutor takes pride in its work.
Of course, the changes aren't nearly complete, if the expectant tingle in your core and the nearby godling's expectant smirk are anything to go by. Your head, while much larger than before, is still very human. You take a deep breath and get ready for the rest of your transformation. Primal energy rushes into your skull, eager to continue its work.