Codex Regius

For millenniums, the World's End: Ragnarok, had been prevented many times over by the Norse Pantheon. But in 1914, the world tree Yggdrasil weakened, causing the boundaries between the 9 worlds to break and creatures began to invade Midgard in a perilous time of the Great War. As a solution to the problem, one man founded the organization: Fellowship of the Nimrods, a brotherhood of hunters who slay beasts and creatures who are unaffiliated and subsidized and sponsored by the entire world, as long as they get rid of the pests.