Patch 9.2 will add another Keystone Hero achievement for the Tazavesh Megadungeon. Players who complete both wings off Tazavesh on a +20 keystone in time will receive a portal to the Tazavesh entrance! This achievement completes the Keystone Hero set.
Each of the original 8 Shadowlands dungeons has a Keystone Hero achievement that unlocks a port to the dungeon entrance, and now so does Tazavesh.
NEW Complete Tazavesh: Streets of Wonder and Tazavesh: So'leah's Gambit at Mythic Level 20 or higher, within the time limit. Reward: Teleport to Tazavesh . Read more on wowhead.com