Diablo 4 season 5 brings players back to hell with a plethora of new features and changes, as detailed in the extensive patch notes for the public test realm. The update introduces a new questline following the main story, along with a roguelite endgame activity called Infernal Hordes where players face endless waves of Hellspawn. Accessing this activity requires collecting Burning Aether and upgrading Compasses of varying difficulties. The update also includes new Legendaries, class balancing changes, and the ability to re-summon bosses without resetting dungeons. Player feedback will be gathered during the PTR period from June 25 to July 2, with adjustments expected before the full launch of season 5. The update showcases Blizzard's commitment to innovation, as seen in the creation of the new class Spiritborn, inspired by the success of Diablo Immortal.