https://www.gamespot.com/articles/monster-hunter-world-deviljho-update-is-out-patch-/1100-6457606/

The major new update for Monster Hunter World has launched, bringing a slate of new content to the game on PS4 and Xbox One. Most notably, it features the first monster to be added to the game post-launch, Deviljho, along with balance changes for almost every weapon type in the game.