Where Sam Winchester shows his true colours

title: On His Head a Crown
author: monicawoe 
artist: slytherkins
word-count: ~21,000
rating: R
pairings: Sam/Brady (non-explicit)
warnings:demon blood force-feeding, drugging, needles, many forms of blasphemy, Sam as Conquest and Sam as God (neither involve possession), global-scale apocalyptic scenario, graphic violence, utopian dystopia, ecotopia

story summary:AU of 5x03 and 5x04 with a very different End!verse
Hunters drug Sam, force-feed him demon blood, and bring him to where they’ve captured Brady. Brady tells Sam he knows how to stop the Apocalypse, and Sam, despite his better judgment, hears him out: Sam himself is the horsemen Conquest—aka the Antichrist—and he alone can bring Lucifer’s apocalypse to a grinding halt. Sam resists, but when he discovers the good he can do with his new powers, he decides to use them to atone for all his past mistakes.

Dean hasn’t seen Sam since they said their goodbyes in Colorado. He falls asleep in a shitty hotel and wakes up in a future that looks like paradise, but definitely isn't. Earth is lush and overrun with plant life, but the world’s human population has dwindled considerably. Those who remain seem eerily happy and worship a living god. Confused, Dean heads to Sioux Falls and finds nothing but a crater. Bobby’s grave gives him a set of coordinates that lead Dean to Camp Chitaqua and a small group of nonbelievers—fighters against the new normal, including Castiel, Rufus, Chuck and Risa. Dean tries to piece together what happened during the years he missed and figure out why he's been brought to the future.

Read it on AO3 | Art Masterpost