"You’re different." The word is quiet between them, near-drowned by the rumble in Stiles’ throat. The Alpha’s nose twitches, like maybe he had an inkling to snarl. Derek - feels his shoulders sink, and doesn’t bother to resist the exhaustion nudging into his marrow, squirming until its uncomfortable.
He doesn’t know this boy.
"It was a mistake," He murmurs, words plucked up from the depth of his head where the lock used to be thick. "You shouldn’t have taken the bite. It was never meant to be yours, you weren’t supposed to be this, you weren’t -"
"Enough!" Stiles booms, and his teeth are ugly and uneven; sharp and jutting. His voice - is a strange breed, of something wicked and feral. Wild, to match the bleed of color in his pupils, pushing at the edges like they could take over the rest of his eye. Derek had seen it before, on wolves driven mad. Stiles is breathing fast, not like panic but like anger, seeing red, and Derek could hear the thunder of his predator heart. It used to rabbit, uneven with medication and excess youth; fear.
A thought comes along, and it says, I could kill him.
Kill him and reclaim his rank.
He looks away instead.
au in which in order to save stiles’ life, derek gives him the bite. stiles gobbles power, swallows derek’s rite, turns the other wolf omega, absorbs his pack - and changes. he becomes a shadow that derek has seen before: of a power-ravenous blind man.