This is my Thor/Buffy story set during Thanos world-wide destruction. It begins with Avengers 3 and Avengers 4 events follow after the first chapter.

Yes, I have previously posted this chapter/story and deleted until I FINISHED it. It is a completed story, so you won't be waiting long for updates.

Dialogue in the opening scene is loosely taken directly from Avengers Infinity War.

Disclaimer: I do not own any of the BTVS characters as they are property and creation of Joss Whedon. The late Stan Lee is responsible for Thor as well as Larry Lieber and Jack Kirby.

Chapter 1: What the Hell?

******Asgard Ship*****

"What the hell?" Thor thought as the pain radiated throughout his body. He could not believe how effortlessly he had been defeated once again. Except this time, it was his people that were being slaughtered right in front of him—his friends.

"Hear me and rejoice. You have had the privilege of being saved by the great Titan. You may think it's suffering, but no, it's salvation. The universe scales tip toward balance because of your sacrifice. Even in death, you have become children of Thanos," one of Thanos thugs said in this really irritating and patronizing voice. Thor wanted to rip out his tongue.

"I know what it's like to lose. To feel so desperately you're right and then to fail," Thanos said as he moved closer to Thor.

Then he picked Thor up like he was a ragdoll. Knowing it was so easy for Thanos filled him both with rage and humiliation.

"Destiny arrives all the same. Now, it's here. Or should I say. I am," Thanos said with a grin.

"You talk too much," Thor said.

"The tesseract or your brother's head. I assume you have a preference," Thanos said to Loki.

"Oh, I do. Kill away," Loki said.

Thanos put his gauntlet up to Thor's face, burning it. Thor tried not scream or give Thanos the satisfaction, but the pain was agonizing. A scream was ripped out of him.

"All right! Stop!" Loki ordered, unable to stand to see his brother suffer like this. They had suffered so much of late, and their bond grew stronger with every battle. No matter his past crimes, Thor loved him. Loki didn't have it in him to betray that love completely.

"We don't have the tesseract. It was destroyed on Asgard," Thor said.

Loki lifted his hand and revealed the stone. He gave Thor an apologetic look while Thor felt sick with a sharp stab of betrayal. When would he learn not to trust his deceitful sibling?

"You really are the worst brother," Thor said to Loki. Loki's voice somehow echoed in head. Forgive me, brother.

"I assure you, brother. The sun will shine on us again," Loki said, stepping forward.

"Your optimism is misplaced, Asgard," Thanos said with a chuckle.

"For one thing, I'm not Asgardian," Loki said. "For another, we have the Hulk."

Thor was relieved when Banner as the Hulk attacked Thanos, who was forced to release him. Thor, however, couldn't believe how quickly he subdued the Hulk, who now lay motionless at Thanos' feet. Desperate and enraged, he attacked Thanos, but it was like hitting a mountain with a pebble.

He was grabbed by one of Thanos' goons, metal wrapping around him, holding him in place.

Thor struggled against his new binding but found that he could not move at all. His eyes met his oldest friend—Heimdall was broken but not yet defeated. He used the last bit of strength he had to send Banner off the ship—at least one of them was live to fight another day. Banner could also warn their friends on Earth of the danger that was coming. Could Earth possibly withstand the coming of Thanos? Thor was supposed to be the planet's guardian, but he failed miserably. All he touched seemed to turn to ash. His father was dead, and Asgard was destroyed. Now Thanos was killing the last of them. Bitterness filled his mouth as he braced himself for the next blow Thanos would strike; he didn't have long to wait.

"That was a mistake," Thanos said. Then he stabbed Heimdall through the heart.

Thor screamed his rage. "You're going to die for that!" he vowed as he watched the light go out of Heimdall's all-seeing eye.

Then his mouth was silenced with a metal guard. Thor felt sick with rage and heartache as he watched Thanos' sycophant sing his praise as he handed him the tesseract. Thanos was wearing the Infinity Gauntlet, and it was holding the stones. How did he get it? Thor's mind raced as he tried to put it together. His sister's attack on Asgard had left the Nine Realms utterly vulnerable to Thanos. She had destroyed his hammer, and Thor was not the magician that his father had been.

Thanos spoke of two more stones being on Earth, and Thor's stomach clenched with fear. Thanos would destroy Earth as Thor knew his friends would not give up the stones without a fight, especially as one of them gave life to Vision.

"If you are going to Earth, might I suggest a guide in that area?" Loki suggested. "I have a bit of experience in that arena."

"If you consider failure experience," Thanos said.

"I consider experience experience," Loki said haughtily. "Oh mighty, Thanos, I, Loki, prince of Asgard—he paused and glanced at his brother. "Odison. The rightful king of Aesir, god of mischief, do herby promise to you my undying fidelity."

He moved quickly to stab Thanos in the throat, but Thanos held up his gauntlet, freezing him in place.

"Undying? You should choose your words more carefully," he said. He pulled Loki up by his throat, choking the life out of him.

"You will—never—be a god," Loki gasped. Then his head fell back as Thanos snapped his neck.

Thor tried to cry out, but his pain was muffled. He watched, helpless as his brother's lifeless body was thrown down in front of him with careless disregard. "No resurrection this time," Thanos said. Then he and his entourage disappeared, taking the bindings off Thor as soon as they left.

Thor struggled to get to his brother's side, pulling him close. He barely got to embrace him before the ship exploded, and everything went dark.

******Slayers Headquarters******

Faith walked up to Buffy, who had just arrived at the main slayer headquarters in Newark, New Jersey. Giles had wanted a place close to major airports, and as NYC was the first place people landed when they came from overseas, it was the ideal location. However, all the superheroes in New York City area made it problematic for the slayers. They didn't want to draw attention to themselves and found that the seedier underbelly of New Jersey kept them plenty busy.

"What the hell is going on, B?" Faith asked.

"I don't know," Buffy said grimly. "But hellmouths all over the world are boiling. The superfreaks are all assembled in some country named Wakanda. Something major is happening."

"I still say we missed an opportunity when we didn't plant a slayer in SHIELD," Xander said. "That would be the best way to know what is happening.

Willow, Dawn, and Giles walked up to the trio. "Yes, we should probably remedy that as soon as possible," Giles said. "We cannot be this blind in the future. Without the proper intelligence, we cannot prepare for whatever is coming."

"Coming? It's already here," Willow said. "My powers are reacting strongly to whatever presence is on the planet. The evil is here now."

"So should we just head to Wakanda and help the supes fight?" Buffy asked.

"There are too many hellmouths acting up," Dawn said. "We have to send the girls to all of them."

"How about Faith and I go to Wakanda and lend a hand to the superheroes?" Buffy suggested. "Willow, do you want to join us?"

"I think I better," Willow said. "Whatever is happening there, I have to try and stop it. I feel like all of life is at risk, and the Earth is crying out in fear and foreboding."

"It is that bad?" Giles asked in alarm.

Willow nodded. "It is, Giles. This is the worst threat that the Earth has ever faced—all of humanity is very much at risk."

Buffy was grim. "Okay. I'll get my scythe," she said. She hugged Dawn. "Be safe, Dawnie."

"You, too," Dawn said, her eyes filling with tears. For some reason, she felt like she might not see her again. "I love you."

"I love you more," Buffy said, forcing a smile. She hugged Xander and Giles before turning to go get her stuff.

"Meet me in my room in five," Willow said to Faith. Willow hugged Xander and Xander. "Take care of each other. Dawn, you stay with Xander, okay?"

"I will," Dawn promised. When Faith and Willow left, she leaned against Xander. "Why do I feel like we aren't going to see them again?"

"Sure, we will," Xander said.

Although he said the words, he wasn't sure it was true.

*****Wakanda******

They had just made the decision to lower the field around Wakanda when three people appeared on the field in front of them.

"Who's the new players?" Sam asked, seeing them appear from above. He and Rhodey had the air support.

"I don't know," Steve said. He glanced at the King.

"I do not recognize them," T'Challa said. One woman had red hair like Wanda while the other two women were blonde and dark-haired. The blonde carried a strange weapon, but she didn't hesitate to jump up and kill the first alien dog that attacked.

"Let's give the ladies a hand," Steve said as he and his friends ran to join the battle.

The creatures were relentless. When one died, there were four more in its place.

He heard one of the newcomers say, "B, these things are bigger than hellhounds. What the hell are they?"

"How would I know? Do I look like Giles?" Buffy said as she decapitated another.

She glanced at Willow, who was now floating, sporting her normal witchy white hair. A force field was all around her as the aliens bounced off her. "I am going to take down that ship," she said, noting where the reinforcements were coming from.

Buffy looked back and saw the super friends were now behind her. "Hello," she said with a friendly smile.

"Willow's going to take care of the ship," she said to Captain America. "Can you make sure the iron guy flying up there doesn't try to harm her? The guy with wings, too."

"Sure," Steve said, bemused by the woman. He relayed to the guys she was a friendly.

Faith, though, winked at him. "Damn, B. He's even hotter up close," Faith said. "I'm really digging the grunge look he's got going on."

Buffy laughed as she stabbed left and then swung right, killing two more. "Well, he is a wanted fugitive—definitely your type," she observed.

Nat frowned at the two women, who seemed too careless. "Girls, maybe you should focus on the fight," she said, pointedly.

Steve spared his partner a glance as they both killed the animals while eying the newcomers.

"Oh, we're always focused," Buffy said, losing her air of congeniality. A predatory look appeared in her eye as she swung her blade without looking. "I just don't need to give 100% of my focus to kill these ugly things."

"I'm Faith," Faith said as she gave Steve a hot look. "When this is over, I'm going to have a really big case of the double H's. I hope you can help."

Steven frowned, confused but nodded. "I'm always glad to help a fellow fighter," he said.

Faith laughed and turned to her sister slayer. "See, B? I told you the super friends would welcome the help," she said.

"Who are you?" Natasha asked as she stepped up to Steve's other side. None of the four paused in their slaying.

"We're vampire slayers," Buffy said. "I'm Buffy. Willow is the witch currently using her magic to fly."

"She's like Wanda," Natasha said.

Buffy shook her head. "No, no one is like Willow," she said simply.

"Guys, what's this ivory queen doing?" Sam asked in the comms.

"They say she's Willow the witch, and she's going to destroy the ship," Steve replied.

"'Cause it's so easy," Sam muttered. He couldn't get his protons blast to go through the shield.

However, the strange, floating woman managed to bring down the shields.

"The shields are down," Rhodey told him.

"Yes, I can see that. Full power," he said. He flew next to the woman. "So, Ivory Will, I'm going to go full throttle now that the shields are done. You got more juice left?"

Willow turned to the man with the metal wings and smiled. "The Earth powers me, so as long as it's still here, I have juice," she said calmly. It amused her that he called her ivory when her hair was very red.

Together, they released their respective powers onto the ship, and then it began to explode.

The ground support cheered in relief, but they didn't get relief for long as Willow sensed a powerful presence—the real threat.

"He's here," she said.

Sam and Rhodey followed her down to the ground even as the alien dogs kept coming.

"The girls took care of the last of Thanos' henchmen," Steve told him.

"Which girls? Ours?" Rhodey asked.

Steve grinned and nodded. "The slayers seem to enjoy killing the alien monster dogs," Steve said.

"Thanos is here!" Bruce yelled in his comms to Rhodey.

"Bruce says Thanos is here," Rhodey shared.

"I told you," Willow said.

"Will, do you have any mojo left to fight the big bad?" Buffy asked, looking at her.

Willow nodded. "I do. The Earth is afraid, and she is giving me so much more than normal. Whatever Thanos is, he is a poison to all of humanity," Willow said.

"Can you get rid of these super hellhounds, Red?" Faith asked.

Willow considered the best way to do so and called out, "Majko Zemljo, pozivam vas da se završi ova zaraza koja bi pojesti svoju decu. Vatra, padati i konzumiraju ih!"

"What is she saying?" Bucky asked Steve.

"It sounds a bit like Latin," Steve said. "Something about fire."

Instantly, all the invaders caught on fire, causing those fighting to jump back from the flames.

"Damn, Red!" Faith said in admiration.

"Why do you call her Red?" Sam asked.

"Because of the red hair," Faith said. They all looked at the white-haired witch, puzzled. "Well, normally she's redheaded. When she's channeling the good magic, she's white haired. When she goes all Dark Willow, she's black haired and freaky."

A breeze blew and the ash piles began to float away.

"I think that giant coming must be the leader of this apocalypse," Buffy said, catching sight of Thanos.

"Apocalypse?" Steve asked.

"It's what we call a world ending event," Buffy said.

"We usually stop one once or twice a year," Faith said with a shrug. "What's your number?"

"I don't know," Steve said. "Three?" He looked at Sam, who shrugged.

"He's getting closer," Buffy said as the purplish man approached. "Man, is he ugly!"

"He's a Titan," Steve told her.

"What's a Titan?" Buffy asked.

"Him," Steve said with a grin.

"Your salvation is at hand," Thanos called out.

All of sudden, a bolt of lightning hit the ground in front of them, and Thor was there with a giant tree and a small racoon.

"That's a sight you don't see every day," Buffy said.

"Thor's here," Steve said, relief in his voice.

"Thank God!" Rhodey added.

Buffy watched as Thor turned to Steve. "Glad to see you, old friend," he said.

"Likewise," Steve said, smiling.

"We need a god to fight a god," Rhodey said, pointing as Thanos got closer.

"These are my friends, Tree and Rabbit," he said, introducing his strange companions.

"I am Groot," the giant tree spoke.

"I am Steve Rogers," Steve said.

Buffy looked at Willow in shock. "There's talking trees? Why didn't you tell me that?" she asked.

"He isn't exactly a tree, Buffy. He's an alien," she said, smiling at her friend.

Thor jumped up and flew toward Thanos, wielding his new axe. Buffy began running to help him, not caring if the others followed. "Aim for his head!" Buffy called out and sighed when the new hottie hit the giant in the chest instead.

"Why can't they learn a beheading always ends a fight?" Faith said, running next to Buffy.

Willow and the others were a half a beat behind.

However, Thanos cried out in obvious pain when Thor's axe went in deep.

"Well, the hell, B," Faith complained. "The lightening god is having all the fun."

Buffy had a feeling, though, that this was just the beginning.

*****To Be Continued*****

I do realize that Thor was there a bit longer before Thanos arrived, but I didn't need him to be there since Willow was. Assume that by the time Willow sensed Thanos and they visually see him, he acquires Vision's stone. Thanks for reading! Reviews are appreciated, nitpicking about dumb stuff isn't. This is meant to be fun, not life-changing! New chapter in a few days.