"Hey! Before you go, can we do a quick spar? We are about to unlock a new mutation, and we just need a tiny bit more combat data," Leo asked as they were on the verge of a breakthrough and a quick fight would really help him.
Mila nodded and beamed a smile. "You asked for it. Any rules?" she checked before cracking her fists. The workaholic loved training.
"Don't break anything in the apartments," the redhead muttered as well; they were short on cash.
"Perfect," Mila said and gave him a thumbs-up, suit already on and getting into a combat pose in the middle of the kitchen.
Leo took a deep breath, trying to focus, and then went to punch her in the face. A simple and predictable attack.
He baited and answered, focusing on Mila's defense as she side-stepped, and then from her ankle, a black snake burst, aimed directly for his leg. A simple trip maneuver that he had seen dozens of times before.
Leo quickly moved his leg out of the way, raising and trying to land a kick on her side. Counter the counter with another counter.
Mila accepted the strike.
PLAP.
The shin of Leo crashed against her forearms, making the girl move a few centimeters on the floor. There was a second where the two looked into each other's eyes, and then Mila opened her mouth, and Leo thought she was going to say something, but a massive black snake came out of her, quickly wrapping around his neck.
"Hhhhhhhhhg!" The redhead grabbed the thick black creature with his hands as a reflex, trying to get it out, but he knew that a normal human had no chance to get out once one of Mila's snakes went for their neck.
There wasn't time to doubt; he went on the offensive and tried to hit Mila's head with a haymaker to knock her out with a single punch. Once she was unconscious, her snakes would go out, so this was his win condition. However, in his condition, Leo forgot something important.
Where did the snake she shot at his legs go?
The dark leash coiled around his legs and made him fall face-first onto the floor, it was waiting for the exact moment to strike. He began to fall, but then something soft stopped him.
"Hey, you lasted 30 seconds, better than the last time," Mila said as the teenager landed right in between her tits.
[Combat experience gained!]
[Level 3: 100/100%]
[Congratulations! You leveled up.]
[Level 3 -> Level 4 0/100%]
Leo slowly got up and touched his neck. "I am going to get better from here," he warned her with a smile and then finally connected a proper strike. A loud slap on that big ass.
She yelped for a second and then gave the redhead a kiss. "I'm counting on that," Mila finally said.
In the small window of time of Mila leaving the apartment through the window and before having to go to work, Leo was lying on his bed completely naked as Nigredo was about to start on his new mutation.
"OK, darling, you better bite a pillow because this one is going to hurt a bit," she warned him as this change was going to get messy.
"Yeah, the pain nullification mutation is far down on the priority list," Leo muttered and took a deep breath, already feeling the thin tendrils of the alien quivering between his muscle fibers.
"Well, I'm going to start . . ." she finally said, and then he felt it, the worst muscular cramp of his life.
Each single one of his muscles, from his legs to his arms to his chest to his back, all of them began to scream in pain and throb at the same time as if they had a life of their own. In complete agony, his body shook, and sweat began to pour from each single pore. A loud scream tried to escape his throat, but Leo caught it before it could get out by gritting his teeth so hard that his gums were starting to bleed.
[New mutation unlocked!]
[Name: Anaerobic muscles rework]
[Category: Muscles]
[Description: A complete upgrade on the user's muscles in order to reach the peak of strength a human can have. Even going as far as to refine the muscle fiber to obtain a strength that someone with godly genetics could achieve after years of hard work and abuse of steroids without any of the negative effects. For example, the user could deadlift at most half a ton as he is right now.]
They weren't the most efficient muscles ever. One could go a lot more lean and get something more focused on aerobic exercise to increase his stamina even more, but what was the point of all that extra energy if you didn't have a way to expend it?
30 minutes that felt like a whole day later, and Leo slowly got up from the bed and looked at himself in the mirror.
He had changed a lot; his whole body now was ridiculously big and even wider. The lean muscular mass he took years to cultivate was stretched and evolved into piles of rock-hard muscles. Massive biceps, colossal quads, abs that had nothing to envy Barbara's, and pectorals that gave him a bigger tit size than Sarah's. Even though his neck got thicker, not a single fiber was spared from the complete upgrade.
"Yeah! I am huge!" Leo yelled, shocked by how big he was now as he flexed his arms on the mirror. Now he looked like something that the Greeks would sculpt in marble, well, with the exception of the tiny dick part since his fuck pole was as big as ever.
"Yep, and I made sure to just fine-tune your ligaments enough so it would not get in the way of your agility," Nigredo added in her tiny tendril form right beside the muscular man.
"Well, time to go to work. I hope Uncle doesn't get weirded out from the change," he said, and then Nigredo turned into his new fitting outfit.
"You didn't grow extra arms or a tail yet, so yeah, you will be fine," the alien muttered, making sure to make his clothes tight enough so the teenager could show some of his muscles while moving around. A little bit hard with a leather jacket, but the jean pants made up for it.