Summary: Scott's pack and Derek's pack fight together against the Alpha Pack who lose and dissolve. Stiles gets hurt in this fight and Cora dies protecting Derek. New bonds are formed between old rivals and a new pack rises from the ashes of the former Alpha Pack. Never in history has a pack existed from this odd mixture of creatures. Erica and Boyd live. STEREK FIC!

Unity Makes Strength

Prologue

"We need to talk," Scott said quickly into his phone while Derek was pacing on the other side of the line.

"How is he?" Derek asked.

"He is in surgery right now; I don't know how he is doing. His heartbeat is slow but that's all I can filter. And he is… hold on just a second. Lydia! Could you please…" silence followed and Derek imagined that Scott was making some hand gestures to his pack member.

"And Danny can you take Jackson to my house please?" Scott's voice sounded through Derek's phone, clearly not focussing on the conversation with Derek at all. When a groan on the background sounded through, no doubt from an injured Jackson, Derek got impatient.

"Scott! Focus!" Derek hissed in the phone.

"Hey Derek, I'm really sorry. Listen I'm sending… the Sheriff has arrived, I gotta..."

*beep* *beep* *beep*

Derek growled loud in rage and felt the irresistible urge to crush his phone and throw it against the wall when Erica groaned in pain.

"Derek, can you, please? It hurts so bad…" she said, breathlessly pointing to her ripped open abdomen.

Derek moved to the steel surgery table and started to lick her wounds, werewolves' saliva contained healing powers (alpha saliva being stronger than beta's or omega's), but even though Derek hated the taste of blood in his mouth he licked her abdomen that was ripped open by one of the alpha pack members they had fought. The wounds were healing a little quicker and when he saw Erica's face relax just a little more, he took a step back and looked at a severely injured unconscious Isaac and a considering-the-circumstances-doing-okay Boyd.

When he heard two different heartbeats enter the animal clinic he shot back up, and wanted to walk to the entrance when he was stopped by a single hand on his chest from Dr. Deaton.

"I'll see who it is," Dr. Deaton said calmly to Derek and his pack.

Derek followed Dr. Deaton and saw the alpha twins standing inside the animal clinic. Their eyes were their human colour, plain brown, and both of them were free of cuts and wounds. They turned apparently Omega's when the alpha pack had dissolved a few hours ago.

"Derek, we want to help. We'll join your pack, we didn't even attack in the first place. We got your little pup Isaac out alive," Ethan said and ignored Dr. Deaton's presence completely.

Derek had listened to his heartbeat, it hadn't moved up, he wasn't lying. His mind was racing; he knew that neither of his three beta's would love the idea. But since all of his beta's were hurt and he didn't have anyone else to protect his beta's or help Scott and Jackson to protect Stiles for that matter, he felt like he didn't have a choice. Scott was still injured on the inside and no one should get hurt again, no one should die.

Derek's thoughts flickered unwillingly to Stiles who was on the operating table now. He looked back into the treatment room at his sister's lifeless, torn open body and shuddered.

"Fine, but you'll become the lowest beta's you won't have any say in anything, you're not worth that," Derek growled at the twins.

They nodded and closed their eyes for a second, when they reopened them, the plain brown eyes were gone and blue eyes replaced them. The twins moved their fingers, as if a tingle was moving through them and then growled at the same time, feeling their strength increasing by becoming beta's. They walked up to the counter where Dr. Deaton's hand was laying on and who looked back at Derek for his permission to let them in. When Derek nodded the counter was held open and the twins entered. They bowed their heads to Cora's lifeless body and moved further in to the treatment room. Isaac, Erica and Boyd were all lying on different steel tables.

"Take away Isaac's and a little of Erica's pain. Boyd will be done healing in a few hours," Derek said to the twins who narrowed their eyes but obeyed his order without talking back.

"How was Stiles doing?" Dr. Deaton asked Derek worriedly.

"I don't know. Scott hung up before he could talk to me. The only thing I know is that he was still in surgery and that his heartbeat was slow," Derek said, growling again.

He kept on suppressing the urge to run to the hospital to see how Stiles was doing, but the suppressing only just held and his pack needed him here. And Stiles wasn't in his pack, neither was Scott, nor the girlfriend-hunter Alison, nor the banshee Lydia, nor the former-kanima-now-werewolf Jackson nor the computer-friend Danny. But nonetheless Derek was worried and wanted to know how Stiles was doing, making sure that Stiles got the best care, which he deserved. Because without Stiles' well thought out plan, none of them would have been alive right now. Derek moved his eyes over all his beta's and Dr. Deaton.

"I'll try calling Scott again."

Hi guys!

This is my first Teen Wolf fic and since I've only recently found out about this super awesome series, please don't be harsh! When I saw the first three seasons I searched for some parts of episodes on youtube where I came across a Sterek video and I was sold immediately. The tension, the sarcasm, the throwing into walls, the glances and cold-hard-piercing looks… (I could continue but hey) short said: the characters are just an OTP for me now.

I know the prologue was like supershort, but don't worry, the average amount of words per chapter is around 4000 words for me.

So, I hope you like it, I have a long Harry Potter fanfic (a Dramione pureblood fic) which is my main priority, but I am kind of in love with Sterek at the moment so maybe I can finish this before continuing Harry Potter?! Also, if you have any critique on this I will take it in and try to improve it to my best ability. If there is too much wrong with my story, I'll just stick to Harry Potter and delete this one, no harm done!

I HATE BAD FANFICS so if this is one, let me know and I'll delete it immediately. If it's 'not that bad', please let me know as well, I still want to improve.

Greetings,

Aimee