Blizzard has added new achievements for the new Dawn of the Infinite Mega-Dungeon, including a Cutting Edge-esque achievement to defeat all bosses before the next raid tier release and one Immortal one to complete the dungeon without any deaths. Completing the Dungeon before Season 3 will reward you with the “of the Infinite” title.
NEW Defeat all bosses in Dawn of the Infinite on Mythic Difficulty before the release of the next raid tier.
Reward: Title Reward: