One of such artifacts that called your attention was an ancient looking nemes from ancient Egypt, that is, the traditional headwear seen in every media about Egypt ever.
Out of curiosity, you pick it up, but you soon become entranced by it, and don't even realize when you put it on your head. It fits easily, just a few sizes bigger than perfect.
You shake your head, snapping out of the trance when you look up and feel the headwear on you. "Huh?" Is all you can express as your eyes shine with a bright golden color and you feel a surge of energy throughout your whole body.
You feel like you're being stretched forcefully by some invisible force that's grabbing you by your legs and your chest, pulling in a rather uncomfortable way.
Your legs soon start to lengthen, and you instinctively stand on your toes.
Your feet begin to expand quickly, forcing their way out of your shoes and tearing them apart, long, black paws make their way out of your socks and scratch the tiles below.
The rest of your legs keep lengthening, and soon does your torso too, soon you feel your whole body stretching; arms, chest, nose, even your neck begins to stretch upwards.
As soon as they stretch, you also feel a stressful sensation, cramps in all your muscles, as they harden and become immensely dense, and broaden throughout your whole figure.
Biceps and triceps bulge out immensely, soon followed by your hands that expand with force, thickening your hands and making them look more and more like paws, although keeping enough mobility to still be usable as hands, claws emerge from then as your palms grow soft, bloated paw pads.
Your chest soon follows, and you let out deep growls as your ribcage expands outwards, taking almost a barrel shape and making your body seem out of proportion. Your abs soon follow, and your abdomen widens, trying to catch up to your upper body. Both areas explode in muscle, giving you huge pecs that expand several inches in front of you, and your abs become bloated and dense.
Your legs widen immensely too, specially your thighs, which squeezed together almost equal your torso in size. They become engorged in muscle, and your legs are left thick and strong.
Your body is now huge, you're almost 9 feet tall, your muscles are immense, making you look extremely wide, your biceps and thighs are as wide as the pillars surrounding you, and your new paw-like hands and feet look massive even for your new build.
Then, you feel an itching sensation all over, your body darkening with the apparition of raven black fur, smooth and shiny. You snarl as your lengthening nose merges with your mouth, vicious canine teeth shaping in your new muzzle, giving you a wide, scary looking snout. Your ears then move upwards and become triangle shaped.
A confident grin forms in your face as your huge paws start feeling your body. You press against your massive pecs with a hand, squeezing a huge, coarse and dark dinner plate sized nipple.
Another hand travels to your backside just as a canine tail finishes forming, and you squeeze one of your glutes. Just as your thighs, these have become huge, wide, and heavy.
Your grin gets bigger as a pleasant feeling takes over your mind, you flex your arms as your conscience is filled with images of battle, of your own muscles, and most importantly. Sex.
Your thighs spread open as a huge sheath forms in between. Images of lifting tons of weight, running miles without stopping, dominating a war by yourself and slaying monsters makes your body tremble and grow further, powerful, each muscle group bulging immensely and visible even with the black fur on top.
You gain confidence and cockiness, experience with any ancient weapon, the knowledge of a formidable warrior and commander, one that has never been defeated, you smirk.
Your sheath lengthens, letting out a massive, human shaped penis, fleshy and veiny, but with a color matching your fur. With this, the other side of your personality develops too, as you receive images of beautiful maidens, priestesses, princesses and even queens reaching to you, rubbing your muscles, tending your every need. You pant as you visualize making out with them. Dark thick lips making way for your muzzle.
You grin knowing they want you. Images of your body having his way with all these beautiful women make you leak and your member turn extremely hard, veins bulging painfully. In fact, new memories fill in, you vividly recall fucking thick, powerful sphinx women, muscular humanoid lionesses, and a crocodilian goddess.
Smiling in bliss, you fall on your knees, with each thigh now as wide as your torso, you make the whole room shake. With your massive paws you get a hold of two pillars next to you, and your grip on them is so hard they crack like mud.
You thrust your hips into the air, feeling each and every single one of these encounters, the feeling of every soft labia making you go crazy.
Letting out a huge, echoing deep howl, and crushing the pillars into dust, you do a final thrust before your balls drop into their new, massive size, and you let out a huge, immense load of pearly white cum that washes away all the other tables with artifacts like a tsunami. The walls and floor are left with a thick, oozy layer of your legendary cum.
You then stand up and let your genitalia drip it's load as it becomes flaccid. You feel a golden collar, a cape, and a loincloth form in your body, the latter barely holding in the massive, 2ft soft fuckstick dangling behind. As a giant sword (shortsword for you) and it's sheath form on the side of your left tight, and a massive shield appears on your back, the headpiece lets your mind go.
You dizzily look around and notice how everything seems smaller, and how close you are from the ceiling, before letting out a deep, rumbling gasp as you look downwards, feeling like you're swimming in a thick, dense sea of black fur as your relatively small head (still huge compared to a human) barely allows you to see past your massive pecs, shoulders, and back muscles. Feeling your whole body ripple and the whole room shake as you take a few steps back with your massive paws, you look around and wonder what's gonna happen next.