BDubs was caught buying out Sahara.
"That ain't bro."
BDubs lashes out at Keralis.
"That was my trident!"
BDubs killed Cleo.
"You'll regret that."
BDubs trusted Cleo, and was betrayed.
"I do revenge."
BDubs... BDubs lost control in Season 5.
Submit to me again. Give up. I'll do better. You are hopeless. I'll be stronger. You're weak.
He only got to have control for so long...
I'm sorry.
Some demons are stronger than others.
Or maybe some people are weaker than others.

Give up. You're weak. You're a disappointment. They never should have trusted you. You should have stayed gone. It's your fault. You don't deserve control. Give me control. Give me control. GIVE ME CONTROL.

It's hard to keep going. And BDubs couldn't. Not when his demon was so strong. So there, alone in his castle, BdoubleO gave up control.

"Oh, you poor poor thing. Did you really think making FRIENDS with them would get you anywhere? But don't worry, BDubs. I'm here now. The BETTER version of you."

Laughing, the psychopath version of BDubs switched to his outfit, putting on the red bandanna and looking out through the window.

"I'll fix things, don't you worry. Once I'm in control, everything will be right again."

The vines were spreading. Each demon had an ability, and BDubs' demon's ability was overgrowth. Around him, everything was covered in vines or bushes, trees beginning to grow out of nowhere, breaking through buildings. New new Hermitville was almost completely destroyed, and Keralis only new that his friend was somewhere inside that mess.

Contacting Xisuma quickly, Keralis observed the wreckage and found that in the center lay BDubs' castle. Keralis explained this when Xisuma quickly arrived. "Shishwamy, the booshes are everywhere! And Bubbles is in there somewhere!"
X's eyes widened at this. "Wait, this looks familiar!" Quickly checking the tab list on his communicator, he found that next to a red username was a vine-covered face wearing a familiar red bandanna. "Oh my notch, that is not a good sign. And that's just one odd thing next to the red username, which shouldn't be possible. I've only seen that red username next to Evil -"

EvilXisuma joined the game.

"You seem to have gotten yourself into a tough situation here, Xisuma." EX commented from behind X. "Have you realized what's going on? I'll give you a hint. I'm the hint."
"You mean... the demon thing?"
"Exactly! Many of your little hermits have them. But I've never seen a demon this strong before." EX snorted. "Strong enough to be in control for an entire season without you noticing."
"An entire season...?"
"BDubs has only been in control for a few weeks total." EX said. "The entire NHO thing was his demon. But Doc, Etho, and Beef didn't realize that."
"So how do we stop him? He has magic, and we don't!"
"... but our demons have magic."

Grian
"Demon? Hahaha what do you mean?" Grian laughed nervously. "I've never heard of and lost control to such thing! I think you've got the wrong person!"
EX sighed, frustrated. "You're a REALLY bad lier. Please, just let your demon appear as a spirit for now. We'll teach you how to share the soul later."
Grian looked reculant, but after a lot of convincing, he finally agreed. "Alright, meet watcher/evo Grian, the guy who took control of me for the majority of my life in the old world, where he blew things up, stole things, broke the rules, and then joined the people who's rules he was breaking."
Watcher Grian laughed, his spirit form causing him to shimmer as he stretched his purple wings out. "How flattering." He commented.
"Come on, let's go get the others." Grian grumbled, dragging his demon along with him.
"Seriously? I don't want to have to follow you everywhere we go!"
"Too bad. If you want to even stay in spirit form, then you have to follow my rules. Now, are we going or not?"

Tango
Tango blinked, a blank expression on his face. "Demon?"
EX rolled his eyes. "So obviously your demon has never taken control of you. Must be the type that just whispers things in your ear and makes you do things."
"Okay, I have no idea what you're talking about."
"Just follow my instructions."
——Timeeeeeee skiiiip!!!——
"So your demon is a literal demon."
"He doesn't look much different from me, honestly." Tango commented, poking the simmering figure. He immediately got a wing in the face.
"Don't touch me!!!" The demon hissed.
"That hurt you meanie face!!!" Tango complained, a new red mark on his face.
"You're a meanie face you meanie face!" The demon retorted.
"I'm not a meanie face I'm an ouch face because my face hurts from you slapping your wing in it!"
"That's not even a good response!"
EX rolled his eyes again. "Could you two stop arguing? We have business to attend to!"

Iskall
"You want me to let out that guy?"
"Yep."
"But he's annoying and I've never let him out before!"
"He's helpful."
"Fineee. Meet the super-mega-cold-demon-of-doom!" Iskall announced as his demon form appeared.
"... your demon looks just like you." EX commented.
The demon turned to EX, an icy cold expression on his face (pun intended). "WHAT did you just say?" The demon growled, ice forming around his hands until they created an ice sword. The demon held it to EX's throat. "Could you please repeat that?"
EX pulled the blade away from him, grunting. "What's your problem?"
"MY problem is you saying that I look like this ugly-faced idiot!" The demon hissed at him, ice beginning to spread across their skin.
"Hey! That's mean!" Iskall complained.
"Do I look like I care?" The demon growled, turning to him.
"No, but you look like you would make a very good Elsa!" Iskall said with a teasing look.
The demon raised it's sword to attack, but was blocked by Iskall's diamond sword. "Did you forget that I can send you back to wherever you came from with just a thought?" he reminded the demon calmly.
The demon hissed in frustration, sheathing the sword. "Fine. But watch your back," the demon warned him. "this doesn't make us friends."

Cub and Scar
"Sure." The two said in usion.
Ex was surprised. "That easily?"
"Yeah. We let our demons out all the time. They're fun people."
"You realize that isn't safe, right?"
"Well Xisuma keeps you out, so I don't think you have the right to say that."
"... whatever. Just summon them in spirit form. Please don't give them control, not now."
"Alright." Together, Concorp summoned their demons - the convex.
"Oh, we're back! Now isn't that delightful!" Scar's demon commented.
"Yeah, for sure. But in spirit form this time. That's new. What do you need?" Cub's demon asked. EX quickly explained the situation, the demons nodding along. "Oh. That can't be good. Well. I guess we can help." Scar's demon responded.
"That was the easier than I expected!" EX exclaimed.
"Well, you can't take over the world if there's no world to take over." Cub's demon replied.
"Okay..." EX mumbled. "Let's just move on..."

(I was going to do Zedaph but decided otherwise.)

Ren
"So you're telling me there's been another person inside me this whole time???"
"What do you THINK happened in demise?"
"I didn't realize, I thought that was just myself!"
"Seriously? You didn't realize??? Wow. Well, just do it."
"Okay."
...
"HOW DARE YOU WARMBLOODS HIDE ME AWAY FOR SO LONG!!!" Ren's demon roared in anger. "You filthy warmbloods, always disregarding me and all that!"
EX rolled his eyes, unimpressed. "Cub was scarier." Ren's demon glared at him, fury evident in his eyes. "How DARE you say that!!!"
EX groaned in annoyance. "Ren, get your demon under control, I don't have time for this."
Ren nodded, turning to his demon and whispering something in his ear. The demon paled and nodded.
EX smiled cheerfully. "Perfect! Now let's move on!"

Cleo
"I'm sorry, but I can't help you." Cleo said.
"What? Why not?"
"My demon isn't here," Cleo sighed impatiently. "Why do you think I'm a zombie? Splitting the soul makes my body weak, so I became a zombie. You wear a helmet for the same reason, don't you?"
EX nodded. "So you're demon is a zombie as well, and you split your soul with her? Where is she?"
"He," Cleo corrected. "It's a he. And he's in a different world."
"Who is he?"
"His name is Zloy, which means 'evil' in Russian."
"Oh... that's a problem..." EX muttered.
"What's a problem?" Zloy asked, smirking.
EX jumped, turning around. "W-what?! How?!" he exclaimed.
"We're connected by soul, idiot. Cleo can summon me here. What do you want, anyway?" Zloy asked, bored. "I have some pranking to do."
"Well, you see, someone's demon is incredibly powerful, and we need you demons to help us fight it-"
"First off, don't call me a demon. Second off, did you actually let that demon take control? How stupid are you? Third, this is none of my business and I really don't care about what happens to you, so no, I won't help. Goodbye and have a nice day." He turned around. "Can you send me back?"
"No." Cleo shook her head. "Not until you help me."
"Ugh fine!" Zloy groaned. "But don't complain if you find a giant drowned attacking your base or something."
Cleo sighed. "Yeah, yeah, I know. Let's just go."

Demon Abilities:
Cleo's demon: knowledge (he's one of the smartest demons out there)
Xisuma's demon: lightning (he can summon lightning)
Tango's demon: fire (basic fire magic)
Ren's demon: soul magic (he can basically make people easier to kill, and I haven't decided anything else yet)
Cub and Scar's demons: vex magic (they can fly, pass through walls, and do what we already know vex magic does)
Iskall's demon: ice magic (he can form ice out of thin air, and gets covered in ice when he get's too upset)
Grian's demon: watcher magic (temporary access to creative mode, anything else I'm still deciding)
BDubs' demon: overgrowth (can summon vines and booshes, along with making trees grow where they normally can't. This can be very destructive. He gets covered in vines when he uses his magic, and often loses most of his sanity)