The Demonstration

As they began to chant, Cardin had to act embarrassed. Shattering expectations aside, he needs a way to establish his dominance despite being ordered. "Okay! okay! I'll do it... if Jaune strips too. I'm not gonna be the only one naked here."

When Jaune agreed, the girls' hollered at their man as Jaune removed his clothes and exposed the tight and developed body Pyrrha trained hard for to come to fruition. The only downside was Jaune's penis as it remained flaccid. After two weeks of no orgasm, his cumsack had swelled as the lack of stimulation resulted in zero ejaculations. Still, the girl's fervor did not diminish.

"Four inches flaccid and six inches erect." Glynda proclaimed proudly.

It was Cardin's turn. As parts of his clothes were discarded and his flesh was exposed, the ladies' excitement dropped. His body was perfect, muscles more developed than Jaune's. His armor helped in masking his physique. And when his boxers were off, silence befell the room. While he sucks at academics and combat, he makes up in natural endowment.

"Se-Seven inches flaccid..." Glynda's hand shook as she measured his monster with her ruler. Her fingers barely wrapped around his soft dick. "Quite heavy as well..." She placed his dick on top of the ruler and showed the girls that he is indeed flaccid, which also gave them a clear view of his balls. Each testis was bigger than Jaune's whole blue-balled ones. But what stood out most was the glowing intricate design that marked his dick and balls.

"I... I bet you're only seven inches erect!" Said Weiss.

"Wanna bet?" Cardin asked. "Get me hard, then if my dick is more than seven inches, you have to suck my cock. If that's okay with Jaune." Of course, Jaune agreed.

Weiss stood from the group as she made her way towards him. She strutted with her head held high, filled with the arrogance that came with her name and status, but that all evaporated when she knelt before Cardin. "You're bigger than Jaune soft than when he's erect, I'll give you that!" she harrumphed as she stroke the member before her. Under her soft delicate fingers, Cardin's cock slowly grew until its shaft dwarfed her entire forearm.

"It's past twelve inches..." Glynda did not even need the ruler anymore, the wooden tool fell from her hand. When she dropped it near Ruby, the leader of team RWBY placed it along her stomach before she gawked at the implication. The girls can barely contain themselves as the suggestions took hold. As their loins hunger, their minds were filled with thoughts of Cardin; how his massive cock would feel inside their sex-starved pussy, and how it would taste.

Luckily, Weiss would have the first honor of finding out.

"A deal is a deal, Schnee." Cardin declared as he looked down at gawping Weiss. Her thoughts raced for any way out, but there was none. Jaune agreed with Cardin, and she can't back down now. Her red lips pecked at his swollen tip before she took more of his head into her mouth. She was slow at first, but one of his magic-enhanced member's qualities started to take root in Weiss' mind.

At first, Weiss was repulsed by Cardin's giant cock. True, it was twice Jaune's size and it is obviously thicker than her wrists. She thought that it would taste repulsive, but as she sucked on its tip, she was proven wrong. Its flavor reminded her of cake butler's delicacies or Klein's cooking. Its aroma was akin to the finest fragrances money can buy. Cardin's cock was delicious! Delectable even! And as the taste and odor filled her brain, she took more and more of his length, but sadly, she can only get it in her mouth, since it seemed that it cannot fit her throat.

"What's up with your dick, Cardin?" Jaune asked when he heard the other girls mutter to themselves. "What's with the glowing designs?"

It was from the ring's magic. The ring granted him to control the mind of others, but its power is more potent to the user that it can change their bodies as well. But Cardin would not disclose that, instead, "It's my semblance." The designs on his balls provided him with a near-limitless supply of virile, delicious, highly addictive, highly nutritious, and invigorating cum, while the ones on his shaft granted its irresistible taste and unnatural endurance. But for the best upgrade, he would have to show them.

When the girls saw that Cardin's cock was too big for Weiss' throat, they were dismayed, but their jaws dropped when they saw his workaround for it. With Weiss' head firmly in his grasp, Cardin pushed his cock deeper into her, with her throat distending for his girth to fit. He only stopped when his whole twelve inches inside before he started to facefuck her.

Weiss' mind was barren save for the immense pleasure she was receiving. Every time Cardin's massive balls slapped her chin, her pussy would orgasm violently, her squirts drenched her panties and the floor below. Her whole body was limp, only propped by Cardin's strength as he used her pristine throat capable of harmonic melodies as a cheap onahole that produced gags and lewd noises. She can't stop, and she doesn't want to. It was days since she tasted a penis, and her days of abstinence were finally rewarded by Cardin.

The sight and sounds of Weiss getting throat fucked was enough for most of the girls to touch themselves in the open; Ruby hid behind her red cloak as she fondled herself; Blake and Yang rubbed the other's crotch which Coco and Velvet mirrored; Nora's legs were wide open as she ditched her spats to finger herself, and Glynda rubbed herself lightly through the fabric of her skirt. It only left Pyrrha whose fingers crept near her mouth, contemplating whether sucking her gloved fingers would emulate the sight before them.

"My cock can stretch out any girl I fuck." It was true, but he would have to keep the other ones secret for now. "It doesn't damage them, just make them stretchy enough to do this!" He roared as he unleashed a stream of cum inside Weiss. The observant among them could see his balls pulsed as it sent its load directly into her gullet. Each pulse expanded Weiss' stomach until her dress ripped to accommodate her bloated belly. By the time he was done, his cum overflowed from Weiss' mouth, drenching the pregnant-looking heiress with his seed before she plopped to the floor ****.

The display fired the onlookers up. The girls each yelled as they orgasmed, their pussy juices squirted high and low. Pyrrha herself was the only one excluded, heaving heavily as she stroke herself to join the others.

But they continued to touch themselves at the sight of Cardin's monster cock, still erect as his thick cum and Weiss' saliva dripped from its length. It looked like it didn't just fill one of their own to the brim. Their mouths watered while their eyes followed as it bobbed and throbbed before them.

"Is Weiss alright?" Asked Jaune. He was on his knees, his fingers on his flaccid dick as he hopelessly jacked himself off. It was a sight that tugged Cardin's heart if he had any. Still, since he already has some sort of control on the hapless cuck, Cardin may as well throw Jaune a bone.

"Hey, it looks like you are getting hard seeing your girls get fucked by real men!" Cardin said as he pointed at Jaune's crotch. Lo, and behold, the blonde boy's dick hardened as Cardin proclaimed, his cock now painfully erect after he watched Cardin conquer Weiss' throat.

"I... I can't believe it!" yelled Jaune as he stood. "I have an erection again!" He presented his penis to his harem. "Cardin was right! I did get hard after watching him! I can have sex again!" Jaune thought that his girls would be happy for him and that he can resume giving them pleasure, but a thought crept into his mind. 'Wait, that's not my purpose anymore. Cardin said that he will take care of the girls' sexual needs. All I can provide them is my love and attention now.' With this epiphany in mind, his jolly smile turned into a solemn one, his mind in peace to what he is now relegated to be. His cock begged for stimulation, but he had to do what's right. His hands to his side, Jaune just stood and left his manhood alone to twitch in the air.

Due to Cardin's spell, the lust-filled minds of every female present was filled with thoughts of him. It distracted them from Jaune's discovery, with none even spared a glance at their lover. Most of them had reached their second powerful orgasm which left them gasping for air. Yet, a single soul managed to stand, her athletic body drenched in sweat. She staggered towards Jaune with her fingers still buried inside her pussy.

"Jaune..." Pyrrha moaned before she told her lover, "I want to have sex with Cardin."

Before Jaune could respond, a firm hand rested on the blonde's shoulder. Cardin gave Jaune a pat in the back before he turned towards Jaune's harem and spoke, "If I'm not mistaken earlier, you agreed that I will take care of the girls' sexual needs from now on, which will mean that they will never consider you as a man capable of giving them pleasure, that the slightest lustful urge will make them crawl towards me, and beg me to fuck them, any time and any place, right?"

Cardin smiled genuinely at Jaune's reply, with the blonde cuckold not realizing that he had sealed the fate of Ruby, Weiss, Blake, Yang, Nora, Pyrrha, Coco, Velvet, and Glynda with a single word.

"Yes."

(Edit: added some properties to Cardin's magic spunk.)