Use the key to get the hell out of here

You turn away from the ominous doorways and hurry back toward the entrance, clutching the stone key in your trembling hand. Your newly enhanced breasts bounce uncomfortably with each step, sensitive nipples chafing against your tight tank top.

"There has to be a way out," you mutter, approaching the sealed stone door through which you entered. The once-ordinary temple entrance now appears more threatening—the stone seems to pulse with the same unnatural energy that permeates the entire structure.

You examine the entrance, searching for any keyhole or mechanism. Your fingers trace the edges of the massive stone slab, feeling for indentations or crevices. Finally, near the center of the door, you discover a small, circular depression that might accommodate the key.

"Please work," you whisper, inserting the fertility-symbol key into the hole. It slides in easily—too easily—and you feel a brief surge of hope.

That hope dies instantly as the stone around the keyhole suddenly liquefies, flowing over your hand like molten wax. You scream, trying to pull away, but your hand is caught fast. The stone isn't hot; instead, it's cool and slick, pulsing around your flesh with disturbing organic movements.

"Let go!" you cry, yanking desperately. The stone extends further up your arm, enveloping you to the elbow.

Suddenly, the liquid stone penetrates your skin, thousands of microscopic tendrils seeping into your flesh. Your scream turns to a choked gasp as you feel the tendrils spreading through your veins, carrying the temple's magic directly into your bloodstream.

Intense heat blossoms in your lower abdomen. Your uterus contracts painfully, then expands, growing slightly larger and more receptive. Your ovaries throb as they swell, their egg production drastically increasing. You feel them releasing not one but multiple eggs, your fertility multiplying beyond human norms.

"Stop," you plead weakly, but the magic continues its work. Your vaginal canal widens slightly, becoming more accommodating. Your cervix softens, its opening growing more receptive to allow easier passage for sperm. Your entire reproductive system is being optimized, enhanced, prepared.

As the transformation completes, the stone around your arm liquefies again, releasing you. You collapse to the floor, gasping and shaking. Between your legs, you feel an embarrassing gush of fluid—not arousal this time, but a clear, slippery discharge designed to better transport and nourish sperm.

The key, now misshapen and useless, clatters to the floor beside you. Where it touches the stone, it sizzles and melts away, leaving no trace.

A deep, resonant voice speaks directly into your mind: "There is no return without completion. The path forward is the only path."

As you struggle to your feet, you notice that your clothes feel different against your skin. Your tank top stretches even tighter across your chest, and your pants cling differently to your hips and thighs. Looking down, you see your nipples prominently visible through the fabric, darker and larger than before.

The doorways before you pulse with light, demanding a choice. The temple has made its position clear—there is no escape until you've retrieved the artifact... no matter what changes you must undergo along the way.