With Patch 10.1.5 PTR, Blizzard seems to be giving Naxxramas the same treatment as Zul’gurub in Patch 10.0.7, with new content being added to the old raid zone, including ancient recipes and a brand new mount.
Below we are highlighting some of the content found in this first build. Be mindful that this is all datamining and not available for testing yet.
New Mount
The biggest addition is Valiance, a new mount that has the source as itself, meaning it will likely spawn inside the old raid.