Blizzard has published a deep-dive article explaining why Kel'Thuzad in WoW Classic doesn't use abilities on strict timers.

Original Message:

He seems to sometimes be going incredibly long periods without casting it, something I can’t find in any video or recall in my own experience.

Blizzard has released a trailer for Shadow of the Necropolis, the WoW Classic content update featuring Naxxramas! Note: the source tweet has been removed (although the tweet in this post still works), perhaps it was posted early as the raid opens tomorrow.

OverviewLootTier 3Scourge Invasions

This is a condensed version of the original 1.11 cinematic, which also highlighted Kel'Thuzad and the bosses of the raid:

The team behind the all-Mage Molten Core clear is back with an all-Mage clear of Classic Zul Gurub!

Classic Warcraft Logs - Hakkar, Jin'do, Mandokir

Similar to the Molten Core clear, the Mages got creative with the lack of tanks, creating a Tank Mage Build that relied on getting aggro after Ignite. The DPS Mages ran with a standard Fire build without Scorch.

Patch 1.13.6 is now live in WoW Classic. Don't forget that Naxxramas releases a few days later on December 3rd.

The patch notes are in our WoW blog.While the bugfixes listed in the 1.13.6. patch notes are now effective, all of the new content included in today’s patch will become available at 2:00 p.m. PST (5:00 p.m. EST) on Thursday, December 3.This includes everything except the Argent Dawn questgiver who allows you to complete attunement to Naxxramas in advance.