Lendriss backed away quickly from Vivian. Who gave chase immediately. Whining as she did
"Nooo. Please, you don't understand. It's everything I wanted. I want more. I need lust!"
As Vivian closed the distance between the two her form continued to dwindle smaller and smaller. Her once enormous tits were almost gone, and she was barely over 6ft tall now. She smiled when she saw Lendriss hit the edge of the tent and stop moving. She was out of places to run now, Vivian continued her pursuit and crawled directly onto Lendriss' lap. Raising her ass high she gave it a quick bounce. Disappointed when she didn't feel anything jiggle. Undeterred, she lowered her head and nuzzled it directly into Lendriss's robes and began to playfully kiss the elfs' lightly toned stomach.
"It's okay, you can love me. I won't bite….much." Vivian cooed as she tried to rub her non-existent chest against Lendriss.
Lendriss looked down at the now smaller form of Vivian. She had lost almost all her height, standing barely 5'2" again. Her curves likewise had all vanished, and while her skin was soft and her tongue delightfully warm, none of that could drive the recent experience out of Lendriss' mind. All she saw in her mind was Vivian growing, getting stronger, sexier, more demanding. There was no way she was going to feed this monster more power. Then she felt a sudden warmth run through her body, accompanied by the familiar sensation of her mana levels spiking. It was similar to when she cast a spell except power was flowing into her not out.
"What, what's happening? Oh, oh! That feels really good like, like the…potion.'' Lendriss said as realization dawned on her. Vivian perked up when she felt a familiar sensation welling up within her new mistress. It felt like lust but different, Vivian licked the air in front of her and recoiled. She could taste the magic radiating off Lendriss and it was certainly of seductive nature, as well as a whole host of other types of magic.
"Mistress? Are you okay? Feeling amorous yet?" Vivian asked hopefully. She hadn't had a lot of chances to work with elves over the few centuries she had been summonable. So she wasn't sure what kind of magic they might use in love making, but this effect seemed right.
Needless to say Vivian's hopes at more power were quickly dashed as she watched Lendriss pull away from her. Vivan stared in shock as her mistress' form began to pulse with a faint pink glow. A very familiar pink glow. Slowly Lendriss began to grow right before Vivian's eyes. Already tall thanks to her previous dose of potion, Lendriss's body began to stretch upwards. Vivan had been face to abs with Lendriss, she now looked ahead as she saw the Elf's leggings pull into view. Said leggings began to pull absurdly tight over Lendriss' crotch till the seams began to split. A second sound of more cloth tightening drew Vivians' attention upward in time to see the already tight shirt her mistress wore under her robes give way. Lendriss's tits now pulled tightly against her undergarments, a modest piece of padded cloth.
"No wonder we're soul bound, you're as flat as…me?" Vivians' comment trailed off as Lendriss's small breasts gave a tiny bounce as they plumped larger. While B-cups might not sound impressive, the fact that Lendriss had just doubled her breast size was. Vivan stared openly as her Mistress continued to expand. She heard the sound of more stitching bursting as the elf's thighs and rear became exposed. Still she grew, now looming over Vivian, Lendriss must have been nearly 8 ft tall. Vivan felt a mix of hunger and jealousy course through her.
"You had more potion! And you didn't share! Mistress, that's so mean! I want to be big too!" Said Vivian as she pouted and buried her head between Lendriss's thighs.
"Hey, stop it. Besides, I don't have any more potion. This was something else. A side effect of, um…" Lendriss stopped speaking as Vivian stared at her quizzically.
"What? Something else, but what. What even has that pinkish…aura…the soul bond." Vivian said as realized what had actually happened to her size. The magic that bound her and Lendriss allowed them to share certain effects. That she knew, it was the same with mages and their familiars. Vivian turned back to Lendriss, who had moved to retrieve a small glowing piece of chalk from her pack. Vivian watched quietly as the young elf began to sketch equations in the air. Runic circles and complex formulae, and a few incantations floated in the air. All while Lendriss, eyes glowing with mage sight, looked back between herself and Vivian. After a few moments she finally put the chalk down.
"Okay, I think I've got an idea. But I need to observe the effect. Vi, come closer." Lendriss commanded. Vivian felt a small tug, a weird feeling like an unscratchable itch. She knew if she didn't obey would only grow worse in time. So she moved closer to Lendriss, who lifted her up and then closed her eyes. She slowly put her lips against Vivian's ass and kissed. Vivian let out a small mmhh, and slowly wiggled her rear. A moment later Vivian felt it. Power leaked into her, and she started to grow. Very slowly, she began to expand in every direction. She felt her ass slowly swelling larger, Lendrisses' lips pushed harder and slowly slid towards her thighs. Vivian let out a moan. Her whole body shook and she shot up a few inches in height. The wondrous feeling was just hitting her breasts when Lendriss stopped.
"No! More Mistress! Don't stop!" Vivian cried
"Shush you. I need to observe this." Lendriss said, eyes still glowing, she stared intently at Vivians' ass. She watched as the power fed to her soul bound companion began to move, fading from Vivian and coalescing through the air. Slowly, then the parts of her empowered by that magic returned to normal, and a nearly invisible cloud of magic enshrouded Lendriss. Then with little warning her body sucked up the magic like a sponge. She shook as the warmth hit her and she grew maybe another inch taller.
"The ratio isn't great, but the fact it can generate real mana from immaterial emotion. No, not just mana, specifically a complex enchantment. Amazing." Lendriss said, still holding the small succubus up.
"Okay, could you word that in a way the rest of us understand?" Vivian asked.
"It means you and I have created what the mages call fulcuri's feedback." Lendriss explained.
"Wait, isn't that what you mortals call the effect that lets the outer planes be infinite?!" Vivian asked, shocked at this news.
"Yeah, as long as we work together I don't think this enchantment has an upper limit." Lendriss said.
"So we can get as big and beautiful as we want! Hell yes Mistress! Let's fuck!" Vivian screamed as she twirled around in Lendriss's grip. Now facing forward at Lendriss, Vivian splayed her legs wide and eagerly awaited her Mistress's help.
Lendriss began to blush, then gently put the little temptress down. Vivan simply laid there slowly bending her legs back further till her heels were nearly behind her ears. The huge smile on her face never fading.
Lendriss stared for a moment, finally feeling just a bit of temptation. If her and Vivian were indeed limitless in the power they could produce the consequences of what she did next would echo throughout history.
Lendriss decides to…