Blackwing Lair Challenge Mode & Class Changes - Season of Discovery Phase 5 Patch Notes

wowhead.com:

Blizzard has released official patch notes for Season of Discovery Phase 5, which launches on September 26 at 1:00 p.m. PDT! Phase 5 will include the new 'Trials of the Dragonflights' challenge mode for Blackwing Lair, a «Flexible» Tier 2 armor system, as well as many quality-of-life updates and class adjustments.

Onyxia, Azuregos, & Lord Kazzak Will Drop Tarnished Undermine Real

PDT (4:00 p.m. EDT, 20:00 CEST), Blackwing Lair will become available.

Blackwing Lair is tuned and intended for ~20 players but the instance is capped at a maximum of 40 players. Blackwing Lair is on a 7-day raid reset timer.

• Trials of the Dragonflights

• Players may speak with Victor Nefriendius (a completely normal human man) just inside the Entrance of Blackwing Lair that will allow them to add additional trials inspired by the different dragonflights.
• Completing the raid with additional trials active will provide additional rewards after Nefarian has been defeated.
• Players may add additional trials at any time, but once a trial has been disabled it can no longer be re-enabled.
• The entire raid must be completed with additional trials active to be eligible for additional rewards.
• Players may enable all 5 trials for the greatest challenge, but no additional rewards are available for activating more than 3 different trials.
• Additionally, there is a weekly «bonus» for having a specific trial in place. Eagle-eyed players will spot a hint for which flight's trial is the bonus each week near Victor Nefriendius (a very handsome, but very normal, human man).

• Blackwing Lair «Flexible» Tier 2 armor system
  
  There are two versions of each Tier 2 armor set available in Phase 5: Core Forged, and Draconic.
• Dragonic armor has all-new Tier 2 set bonuses and may be purchased from Victor Nefriendius (still just