Corrupted is the Season 4 Mythic+ Affix in Patch 8.3 Visions of N'zothPosted by World of Warcraft October 9, 2019 in
Announced in yesterday’s Vision of N’zoth Preview, Ion Hazzikostas announced the Season 4 Mythic Affix, Corrupted! This Corrupted Affix will allow players to make some interesting skips without the need for a rogue or invisibility.
From the development preview:
With this Corrupted Affix active, when you go into a dungeon in Season 4, you’ll see occasional Black Empire obelisks dotting the landscape.