I don't the X-Men, those belong to Marvel Comics and were created by Stan Lee and Jack Kirby
Buffy the Vampire Slayer was created By Joss Whedon and all the characters with the BTVS TV series are his as well.
The Thundercats were created by Ted Wolf and currently belong to Warner Brothers, at one point in time Marvel comics did do a run of the them in comics form, although DC comics do them now.
This is a piece of fan fiction. I make no claim to the characters within it and am not writing this to gain any form of profit. This is mostly done for my own amusement and I hope for the enjoyment for the handfuls of people reading it.
“Thanks for taking me here Oz.” Xander said to the stoic teen.
“No problem, though you're paying for gas on the way back. You're killing my mileage.” Oz told him.
Xander nodded as the two teens got out of the van and headed towards the veterinary clinic on the outskirts of town. They were here based on Jenny Calendar's recommendation of using livestock scales.
“You sure it's okay to be here?” Xander asked Oz.
Oz nodded. “My uncle runs the place. I've been needing to visit them anyways. I've got a kid cousin toddling around here somewhere.”
“Oh. That's cool then.” Xander said as Oz rang the bell.
David Osbourne opened the door. “Oz, it's been a while. What brings you out here? And what... who's your friend?” David said, catching himself mid sentence.
Xander fought the urge to hiss at this man... he smelt like a.... “Oz did you know your uncle's a werewolf?”
“Huh.” Oz said quietly.
“Guess you didn't then.” Xander said. “Hi, I'm Xander Harris, a friend of your nephews.” Xander said before taking off the necklace that had the glamor.
“Woah, a cat man. That's new.” David Osbourne said. “You're not here for a physical are you?”
Xander shuddered then shook his head. “No, just to use your scales. I need to find out how much I weigh and the one I've been using doesn't go up high enough.”
“Well... just don't try to attack me and the missus, or my son Jordy. I'm going to go warn them. Stay here for a minute would you?” David said before heading back inside.
“Werewolves?” Oz asked Xander.
Xander shrugged. “I stopped myself from hissing at him. He smells like a wolf, a man and something else. I went with werewolf.”
“How deep does the rabbit hole go?” Oz asked him.
“I'll let you know when I get there.” Xander said with a sigh.
“All right you two, let's get you inside before someone drives past.” David said before heading inside the heavily air conditioned office.
Even with the relative coolness and low humidity of the air you couldn't mistake the smell of so many animals for anything else. Xander fought the urge to sneeze as they made their way to the larger examining area.
“We've got some scales that go up to five hundred pounds and I've got one used for large livestock. What's it going to be?” David Osbourne asked the teen.
“Let's start with the five hundred pound scale and work our way up.” Xander said as he rubbed his face.
David nodded and showed him the scale. Xander stepped on it.
Everyone looked at the wheel as it spun until it went past the five hundred pound mark. David sighed and Xander got off the scale.
“Let's go for the livestock scale. I'd love to know where you're keeping that mass son.” David said to Xander.
“If I knew I'd tell you. I'm scared that I'm going to break anything I sit on at school.” Xander said as he was led to the large rectangular scale that had a heavy duty stall around it.
Xander got into the scale and David turned it on. “It says here you weigh six hundred and fifty pounds.”
“You pig.” Oz said.
Xander sighed. “I still don't get how I gained three hundred pounds overnight.”
“Well has your size increased at all?” David asked him.
“Not really no.” Xander said, honestly.
“If your size hasn't increased your density has. I can do some simple tests here but if your mass has increased like you said it has, specialized furniture may be the only way.” David said reluctantly. “I can recommend a guy I know but unless you drop some weight, it's going to be a dead giveaway that you're not normal.” David told the teen.
“What sort of tests can you do?” Xander asked him.
“Skin test, maybe get a look at your muscle tissue and a sample of your bone, but you've got the mass of about three and a half people your size. I don't know how easy those would be to get.” David said after a moments thought.
“The muscle and bone things sound painful. I'll take your word on those being denser. I don't know about the skin thing though. I got impaled pretty easily a couple of weeks back when I weighed about half of what I do now.” Xander told the veterinarian.
“What were you impaled with?” David asked him, genuinely curious.
“Railroad spikes.” Xander said as he rubbed one of the spots where that crazy vampire had stabbed him. He hadn't even gotten that bitch's name.
David eyes widened. “ You were impaled through the lung with a railroad spike and you lived?”
“Two.” Xander corrected. “I'm a fast healer. Let's do that skin thing.”
David nodded and put on some protective gloves before reaching into the bottom tray of his sterile cabinet and pulled out a small scalpel. “I'm going to try to shave off some of your skin, do me a favor and stay very still.” David said as he had Oz hold Xander's arm on the counter top.
“No disinfectant?” Oz asked his uncle.
“The blade is sterile, and if I'm right he doesn't need it.” David said while Xander nodded.
David took a skin sample after digging a little. “That was harder than getting a sample from a cow.” He said as he watched the wound heal right before his eyes. “You're not a normal shifter are you?”
“What do you mean?” Oz asked.
“Silver. You used silver.” Xander guessed. “No, I'm not. I'm a mutant.”
“You smell more cat than man right now. I had to make sure.” David told him. “Oz you smell a little off yourself. What have you two been doing?”
“We dressed as Thundercats last night for Halloween. A chaos mage turned our costumes into reality.” Oz told his uncle who nodded.
“I hate magic.” David muttered.
“Tell me about it.” Xander commiserated.
David put cleaned the skin shaving up a little and put it on a small slide and put it in the mini fridge he kept some of his drugs in. “I'm going to take a look at the sample a little later if you don't mind.”
“Just keep it quiet okay? I don't need some mad scientist after me.” Xander told him.
The two Osbourne men looked at him like he was crazy.
“What? A few weeks back I helped stop a guy who reanimated his dead brother. Stranger things have happened.” Xander said in his own defense.
“It is a Hellmouth.” David said with a nod.
“So, werewolves? How's that working out for you?” Oz asked his uncle.
“Not bad to be honest.” David said. “Helps when the animals know you're dominant to them.”
“Ah.” Oz said. “Well we'll be going now.”
“You can still babysit Jordy every now and then right?” David asked.
“Just as long as he doesn't bite.” Oz told his Uncle who looked a little sheepish.
“I'll work on that.” David said before letting the two teens out of the clinic.
“Thanks Oz.” Xander said to the teen as he was dropped off at his house.
“Later man. My band's playing at the Bronze on Wednesday. You and everyone else should check it out.” Oz said.
“I will.” Xander told him before the guitarist drove off.
Xander sighed as he made his way into the house.
He walked past his parents who were dozing in front of the television and made his way into his room.
There was a letter on his bed.
Not really phased by this, he opened the letter that had been sent to him by Destiny.
I'm sure your fairly upset by the changes you've gone through. I would say I'm sorry, but that would be a lie. You've had time to acclimate to being a mutant, now you will adjust to your new changes. As for your mass problem... it's not really an issue. You can control your mass. Work on it. I'll be in touch.
Xander sighed. “ I can control my mass... right...” He said with disbelief. “I'd better work on that before I work on that other thing since I've got the glamors... It's gonna be a long night.”
And it proved to be just that.
Xander managed to figure enough out before dawn. He still had enough time to get enough sleep before church. After eating he showered and very carefully cleaned the drain of any and all loose hair that had gathered at the bottom of the shower.
The real problem was he couldn't comfortably wear his dress shoes due to his toenails. The only option he had were some sandals. He went with those before heading to Buffy's house. It was a sunny day outside and he was really enjoying the sunshine. It made him feel almost, playful.
Xander picked up Buffy and the two teens walked the half mile to the church in silence. Xander didn't want to ruin Buffy's introspective mood.
“Xander, Cheetara was a seer right?” Buffy said, mere minutes from the church.
“Yeah, why?” Xander asked her.
“No reason.” Buffy said before going quiet again.
Xander didn't prod her. If she'd gained anything from Halloween, it was hers to share. Besides being a seer didn't sound like all it was cracked up to be.
It was after the services when he finally asked her.
“What did you see Buffy?” Xander asked her.
“You're going to live for a very long time.” She said quietly.
“Oh.” Xander said. He didn't really know what to say to that.
“So what's this trick you want to show me?” Buffy asked him as they were standing in her back yard.
“Check it out.” Xander said as he stood on one leg.
“Good for you.” Buffy said with a confused look on her face.
“That's not it.” Xander said before lifting the other leg.
Buffy stared, dumbstruck.
“Go on, give me a little push.” Xander said with a grin.
Buffy did and Xander floated away from her, his body spinning slightly from where she'd pushed him.
“Whoa,”Xander said as he got a little disoriented. “Didn't expect that.” he said as spun some more.
“What did you do?” Buffy demanded.
“My mass is variable.” He said with a grin as he stopped spinning.
“I see that. What did you do?” Buffy demanded before poking him again, causing him to spin in a lazy circle as he drifted backwards some more.
“I got another letter from Destiny.” Xander told her.
“What do you mean 'another'?” Buffy asked him.
Xander told her.
“Oh.” Buffy said.
“So what did you see?” Xander asked her as he increased is mass back to normal and stood back on two legs.
“You were laying flowers on someone's grave. You were the same as you are now but the writing on the gravestone was from like sixty years from now.” Buffy said with a sniff.
“What did the gravestone say?” Xander asked her.
“Someone named Kurt.” Buffy told him.
“Oh.” Xander said softly.
“That means something to you doesn't it?” Buffy asked him.
“I have a half brother named Kurt. Was the last name on the tombstone Wagner?” Xander asked, a little afraid to hear an answer one way or the other.
“It was. Wait, how do you know you have a half brother?” Buffy asked him.
“Magic.” He said quietly. “I haven't met him yet.” He told her. “Weird knowing when he might die before meeting him.”
“It's a possible future right?” Buffy said while Xander nodded.
“I'm going to what I can to make sure he lives to die of old age.” Xander promised, mostly to himself.
“So what do we tell Giles?” Buffy asked.
“Nothing unless this starts to help out with the Slaying. Cheetara's visions came in handy but forcing them never really went well.” He told her.
“Right.” Buffy said with a nod as she half remembered several incidents along those lines.
“I swear I'm taller.” Buffy told him the next day as they made their way to school
“Have you measured yourself to find out?” Xander asked her.
“No, but my pants seem shorter.” She told him.
“Have you been doing your own laundry again?” Xander teased.
Buffy thumped him on the arm.
“Fine, look we'll start keeping a record okay? You could still be growing you know. Considering how tall your mom is, you might still grow a few inches.” Xander told her.
“I guess you're right. I'm still a little weirded out from Halloween. Have you made any progress on looking... well normal?” Buffy asked.
Xander frowned. “It's way harder to do than the mass thing. I can get my fur to change color of I can get it to retract, but not both at the same time. So it's a work in progress.”
“You'll get it.” Buffy assured him.
“From what I've seen, my mom's a shapeshifter. I don't know how long it took her to master what she can do.” Xander said.
“You really got the best of both of them huh?” Buffy wondered.
“If you see it that way. I have a brother who I think is normal.” Xander said with a shrug. “He's not exactly a good guy though. I don't really understand the full mechanics of mutation and inheritance. My Half brother looks way different than I do. He has two fingers and a thumb on each hand and two toes. Sounds weird, but totally suits what I've seen of him.”
Buffy crinkled her nose at the idea but it was true she'd never seen the guy. “Let's just hope this week is a quiet one. I don't think I could stand any new changes.”
It was halfway through the school day when her hopes were dashed.
“Ford! Oh my God! What are you doing here?” She said as she almost literally ran into her old friend in the hallway.
“My Dad just got a job here in Sunnydale. I'm going to be finishing my Senior year here. It's good to see you Buffy. We should hang out later.” Ford said to her before heading off to class.
“Who was that?” Xander asked her as they got into class.
“Billy Fordham. I knew him back at Hemery.” Buffy told him.
“What's wrong with him?” Xander asked her.
“What do you mean?” Buffy asked, confused.
“He... doesn't smell good. He's sick.” Xander told her.
“You're sure?” Buffy asked him.
“I haven't hung around hospitals so no, but that's what it feels like my nose is telling me.” Xander told her.
“Well I guess there's only one way to find out.” Buffy said with a sigh. “Why can't things ever be simple?”
“Um...it would get boring?” Xander ventured before dodging a punch. “Easy, we're still in school. Let's see if Willow can dig anything up first. It would help instead of just going by my nose.”
Buffy nodded. “We can see what she can find at lunch.”
The news wasn't good.
“Why isn't he in a hospice?” Xander wondered aloud as Willow managed to scrounge up his medical records.
“Better yet why is in Sunnydale?” Giles asked.
Buffy frowned. “He's my friend.”
“Well he could have a bucket list.” Oz said from where he was sitting.
“A what?” Buffy asked.
“A bucket list. List of things to do before you die.” Oz explained.
“But he said his Dad transferred here. Billy is listed as missing.” Buffy said to Oz who simply shrugged in response.
“I hate to be the one with a negative viewpoint in all of this, but do you think he knows?” Giles asked as he sat down at the table.
“But what would that do?” Willow asked
“Slayer blood is a sought after item in some circles.” Giles mentioned from where he was sitting.
“That's enough from the peanut gallery. I'll talk to him after school. Giles, call his father and see if he can get down here.” Buffy said to her Watcher. “If he's up to no good, he won't get away with it.”
“Good plan.” Oz commented.
“Thanks.” Buffy said with a sigh.
“Xander I want you to keep tabs on us during the meeting. If he runs or anything else, sit on him or something.” Buffy said to her friend who nodded and vanished from sight.
“You know if we actually did any regular stuff in the daytime, that would come in handy.” She said before she saw Ford come towards the library.
For once, Xander kept his mouth shut.
“You did the right thing Buffy.” Xander said from where he was sitting. “He's dying. Desperate men do desperate things.”
“I know, I still feel like I betrayed him somehow. Does it get easier?” She asked him.
“You want the truth?” He said with a grin.
“Lie to me.” She told him.
“It gets easier.” He told her.
“Liar.” Buffy returned.
“Maybe I am. Doing what is right is generally harder than doing what is easy. That's something I've come to learn.” Xander told her. “Come on, homework isn't going to finish itself.”
Buffy wiped her eyes and followed him.
AN: It was going to be much darker ending originally with Giles and Xander capturing Ford and withholding his pain meds until he spilled the beans, but I went this way instead.