Overall, the nature-resist gear that was released in original WoW in patch 1.11 was catch-up gear. It was released along with Naxx to help close the gap for guilds who were still dealing with trying to get certain pieces from Green Dragons and Maraudon because they were stuck on Huhuran.

To be specific, here’s a list of pieces that are not in WoW Classic 1.13.5:

Type	Name	Source
Plate	Ironvine Belt	Blacksmithing
Plate	Ironvine Gloves	Blacksmithing
Plate	Ironvine Breastplate	Blacksmithing
Leather	Bramblewood Belt	Leatherworking
Leather	Bramblewood Boots	Leatherworking
Leather	Bramblewood Helm	Leatherworking
Head/Leg Ench	Savage Guard	Quest (Zandalar)
Ring	Band of Cenarius	Quest: A Humble Offering
Cloth	Sylvan Shoulders	Tailoring
Cloth	Sylvan Crown	Tailoring
Back	Gaea’s Embrace	Tailoring
Cloth	Sylvan Vest	Tailoring

We’re still considering precisely when to release this gear, given their usefulness and purpose. As with original WoW, that time will come later, after AQ is opened and being raided.

Clarification About Nature Resist Gear in WoW Classic