Isobu's home in the ocean away from the mist

Isobu rests in the ocean in the land of water not close to the mist, but myths have traveled of a mysterious beast that wont let a soul travel through the ocean pass.

Mona has heard rumors of a beast blocking the ocean trade in the land of water. Usually Mona would brush this off as a rumor, but since her village was just attack by a strange beast, she needed to be careful. She planned to assign a team to travel to the ocean pass and investigate. She assigned Toru Oshinu, and Ray Kiyome to go investigate and gave them a scroll with a summoning seal that would summon her once in a dire situation, or for sealing.

Toru arrives at the scene on a very old boat by himself and is still waiting for Hiro to show up.
"Where is he?" Toru says. Suddenly the boat starts to violently rock back and forth like a toy boat caught in a Tsunami. Then, a giant beast emerges from the ocean and breaks Toru's boat in its wake. Toru scrambles to get the summoning scroll out but he cant because he's stumbling about in the ocean. Toru then brings out Nuibari to rappel onto the 3 tailed beast. Once on the beast flails about in an effort to fling Toru off. However, Toru stays strong and sticks to the beast. He then unfurls the scroll and bites his fingertips to summon Mona.

Isobu dives underwater to try to drown Toru he was enraged that someone disturbed his home, and slumber.

Mona felt herself summoned to the battlefield and found herself on the back of Isobu. She jumped off and landed on the ocean surface, being able to walk on water by covering her feet in chackra. Her blue chackra chains sprouted from her back and she sent them to the beast hoping to bind it.

Rocore had set sail some time ago with a handful of other ninja from his clan and mostly trade goods otherwise. The raikage had run off to secure another tailed beast and he was left to do the actual diplomacy between the burgeoning villages... Still something interesting was happening as he boat entered a straight to a village the water took a tumultuous turn, writhing and sending massive waves against them.

A storm had brewed the likes of which surprised even him. Still the large vessel faired well and a moment later he saw the three tails taking what looked like a young man below the water. "Keep a sage distance! Do not let the boat be destroyed!" He shouted as he began concentrating his eyes focused on where the Bijuu had been. "How could I be unlucky enough to find another..." A moment later he spotted Mona attempting to bind the beast with chains, he was impressed but doubted it would be enough.

Isobu threw Toru up out of the ocean letting him fly he dove deeper to escape the chains once far enough he blasted chakara infused water blasts from deep under the ocean. Once distracted he rolled himself into a ball his hard armor to defend him as he rolled and shot himself up with the water blasts.

Mona jumped backwards to escape the blast, her chains receding into her back. she saw the beast emerge rolled up into the air. She shot a blast of boil release: Skilled mist at the thing while it was in the air. Anything hit by the mist, besides the castor would began to melt, even the beasts tough shell couldn't protect being melted by acid.

Isobu quickly dove back into the ocean it began to feel quiet as if the beast had given up it was to quiet. That's when the water seem to stir and the thing that was being shot at her was a tailed beast bomb.

Rocore grinned as he opened his eyes, the light blue markings of his sennin mode beneath them. He could feel the beast, as if on cue the storm seemed to grow even more severe, lightning striking the water at random. He walked over over the water, making his way to Mona. He was still some distance away as the beast bomb broke the surface but was surprising all the same.

His brow furrowed as he tried to come up with a way to bring the beast to the surface. A moment later he had. Mixing wind and water he created a tornado that formed a whirlpool on the water's surface that began to expand and descend to the beast's location. "I can feel you..."

When the beast went under water again Mona brought out Samheda and joined with it, she looked just like Kisame did when he joined with Samheda except she was a dark blue, and kept Samheda's rough skin. She dove underwater now able to breath and saw the beast charge up and begin to fire a beast ball she veered to the left to dodge it, and then let loose a water shark bullet at the beast. She saw a whirlpool descending from above so she swam to the surface, away from the whirlpool, to see who was casting it.

Isobu blasted water chakara bullets at her and tried to strike the woman with her three tails and began to speak "leave me alone!!"

Beneath his mask a grin formed, water, wind, lightning... He was in the midst of a perfect storm of controllable power. He glanced at the half-woman half-shark but didn't seem to mind. He had another goal. The whirlpool was only growing, worse still the clouds looked as though they were descending coming closer and closer to the water's surface. By channeling the air currents he pushed the clouds into the opening left by the whirlpool, if his idea worked it would be a glorious mixture of elements he wondered if even he'd be safe from it...

Mona built up chackra in her arms and sliced the bullets with her blade like arms, absorbing the chackra from them, to replenish her strength. She kept veering away from the whirlppol that was aimed at isobu.

Isobu glared at the man causing the storm and fires tons of chakra infused water bullets at him while using his tail against mona

Mona easily out swims the tails, thanks to her shark speed, she used her blood release to strengthen her arms, and grabbed the tail, and began to absorb chackra from the beast at an alarming rate.

Rocore grinned as the water bullets came his way, he altered the swirling vortex to draw in the shots, spin them around, and send them back at the beast. He wondered if it would even truly hurt the creature. Even so he moved the vortex closer to see if he couldn't pull it in. The clouds were in place now filling up the open space caused by his whirlpool. It would be a matter of time be fore the beast was sucked in.

Isobu began to weaken but continued to fight no matter how hard he tried these ninja were amazingly powerful.

Mona was swiftly draining the beasts chackra holding the tail with all her strength. "I, the Mizukage cannot allow you to terrorize the ocean in the land of water. It is my duty to protect it."

Isobu stares into her eyes glaring at her "it was my home first you all disturbed me!!!!" he strikes with his chakara at full blast in a final resort tailed beast bomb.

With the beast being almost held in place, the whirlpool moved until the creature was being sucked into it and likely Mona too if she didn't let go. Rocore could feel the woman's chakra growing but felt it more important to put the beast out of commission first. With the clouds descended he used his lightning style to supercharge them and finally force a spontaneous discharge.

The clouds exploded in a burst of intense light sending a massive electric current into the water far greater than any natural force. "Rocore Yotsuki, Lord of Storms.... Has a nice ring to it." The sky cleared after this massive attack and the water itself grew calm.

Mona could feel a great force of chackra so she let go of the beast and swam as swiftly as she to the surface, veering to dodge the beast bomb, and jumping out of the ocean as this electric current hit. She masked her feet in chackra to not be touched by the electricity.

the weakned beast knew he was defeated and tried to swim away from the two warriors

(Isobu... Did you totally miss what would've been the largest single lightning bolt in history shocking the water? I mean fish are probably dead for several hundred feet after that. Electric eels would be fried.)

(edited)