The Midnight pre-expansion event arrives on 20th January (NA) / 21st January (EU). Whilst we’re excited for new content, we still have a little time left to tie up any loose ends in The War Within. Everything listed below will either be unobtainable, or much harder to get once the pre-patch launches—and time is running out!
Dungeons
The War Within Keystone Legend: Season Three will no longer be obtainable after the pre-patch hits. Attaining a Mythic+ Rating of at least 3000 during The War Within Season Three will grant this achievement, and also awards the 
Scarlet Void Flyer mount.
Mythic+
The Mythic+ leaderboards will lock at 10:00pm PST the night before maintenance in each region—January 19 at 10:00pm PST for NA / January 20 at 22:00 CET for EU. With the season’s end, ratings that qualify for the 0.1% “the Unbound Hero” title and achievement will be recorded. The title will be rewarded in the following weeks after the season ends.
Raids
The 
Ahead of the Curve: Dimensius, the All-Devouring, and Cutting Edge: Dimensius, the All-Devouring achievements will be unachievable upon pre-patch launch.
However, the AotC 
Royal Voidwing mount will still drop from Dimensius on Heroic difficulty up until the launch of Midnight.
The Cutting Edge mounts listed below will all stay 100% drop rates until the launch of Midnight:
-
Ascendant Skyrazor -
The Big G -
Unbound Star-Eater
After Midnight’s launch, drop rates will plummet and these mounts will be much harder to get.
Delves
The Season 3 Delver’s Journey looks set to end on the release of the pre-patch. If you haven’t yet got your hands on the 
Delver’s Mana-Skimmer Schematic: Hyperdrive, now is the time to do so. This is rewarded from the 
Let Me Solo Her: Nexus-Princess Ky’veza achievement, and unlocks the Hyperdrive customisation for the Delver’s Mana-Skimmer mount.
Once the pre-patch releases, this customisation option is expected to be a low drop chance.
PvP
The PvP season will end one day before the pre-patch, on 19th January (NA) / 20th January (EU). From these dates, the following will be unobtainable:
Astral Gladiator: The War Within Season 3 awarding the “Astral Gladiator” title and the 
Astral Gladiator’s Fel Bat- Astral Legend: The War Within Season 3 awarding the “Astral Legend” title
- The Arcane Weapon Illusion awarded for
Rival II: The War Within Season 3 - PvP Elite transmog sets awarded upon reaching 1800 PvP Rating
While many PvP rewards are leaving, the 
Vicious Void Creeper mount will stay until the launch of Midnight.
Thanks to MrGM for the video:
