While excited to put her idea on trial, Evarista ran into a problem right away. Her initial plan was to generate two layers of epidermis and pour unspun silk dope between them, but that wasn't enough to make silk. The dope had to be sheared to make it solid, and while that was easy to do with a string, it wasn't as easy to shear a whole sheet at once. Would she have to make one huge, flat spinneret for that? That would be too impractical. Brought to a pause, the morpher stared at her lanky talons blankly, trying to come up with an alternative method. Think simple, think abstract, she told herself. That was the exact opposite of what all the great lectors at the Institute taught her, but being the dumb dropout that she was, she grew used to using dumb dropout methods to get what she wanted. As long as it worked, right?
Imagining a spinneret, the way she used to make it in her mouth, gave her the answer. When using a spinneret, you don't spit out a bunch of goo and then try making strings out of it, you shear the silk as you pull it out of the gland. Making wings didn't need to be any different. She wasn't supposed to sprout a skeleton and then try wrapping silk around it, she was supposed to make everything work together as a package. Realizing that she's been doing everything backwards, Evarista gave a long sigh of frustration and began degenerating the long talons until they were human-sized. But that wasn't all. She continued degenerating her arms... until they were gone, completely absorbed into the base of the shoulders. Being built from scratch was a part of the mechanics behind her idea.
Not having arms felt uncomfortable, but it was temporary. In each of her shoulders, she generated a large spinneret, feeling the foreign yet familiar biology swell under her skin, and the gland fill with unspun silk. This would be the base. Now came the most important part. When she was spinning silk normally, she used a pair of mandibles with pincers on the ends to pull and shear the material, and this would be the same, except that the freshly sheared silk would be permanently attached to the levers used to shear it - the fingers, which would do the shearing through the very force of their own creation.
Concentrating on her right shoulder first, Evarista began generating a "hand" with "fingers"... inside of the silk gland. The chitinious prongs were to pull the silk dope out of the gland and through the spinneret as they grew, shearing it in the process. But it couldn't be done gradually; it had to be done quickly and forcefully, so that the silk was put under enough pressure to be sheared, and thus solidify. Abrupt growth of tissue was not something Evarista had pleasant experiences with, and she'd have to practice to make it smooth, but she was comfortable enough with the materials to know that she could do it. Once the budding talons had gone through the liquid in the gland and touched the back of the spinneret, the morpher clenched her teeth and prepared herself for the moment of truth.
Since her sight was used to darkness, the flash of luminescence seared her eyes, but they remained wide open as a macabre bloom burst forth from her shoulder. Stripes of black and bright yellow, the exoskeletal fingers, expanded and unfurled like a flower before her, stretching and pulling a softly glowing membrane. A strong surge of nausea pierced her body, almost making her hurl; the rapid growth made her feel as though she was roughly turning her flesh inside out. Even as her body was still shaking in revulsion, her eyes stared widely at the new limb as it straightened out, with drops of luminescent slime staining the roof below. This was right. This had to be right. The rush of adrenaline spurred her to shift focus to her second shoulder. If she didn't do it right away, she wouldn't be able to do it at all.
"Aaaugh! Rrrh..."
The other limb bloomed just as harshly and rapidly, the sheared silk spreading its surreal green light through the air. Droplets of glowing liquid sailed high into the night sky. Trembling violently and barely able to stand, Evarista leaned her back against the chimney behind her, with streams of sweat rolled down her face and bare torso. Fortunately, the mind-quaking nausea retreated as quickly as it had struck, as her body gradually got used to the rudely introduced limbs.
Finally regaining enough composure to look at her creations, the girl simply stared in silent amazement, spreading the wings carefully before folding them to prevent being blown to the ground again. Framed by chitinous fingers was a mantle of sheer, elastic silk, emanating its ethereal bioluminescent glow across the roof and her tired body. It was a pair of bat wings, just as she practised earlier, but it was also something more. It felt like a part of her. Even though she used a bat as a model, she ended up using only arachnid materials: chitin and silk. These wings were something that Nature couldn't dream up in her most feverish nightmare; an abomination beyond any mortal's most perverted fantasy. It was majestic.
"Haha... hahaha... hahh..."
Feeling the last of her strength leave her, Evarista slid down to the ground, breathing heavily staring at the black sky above her. It no longer seemed so distant. For just a moment, it felt like not only her body, but her soul grew wings as well.