Timewalking raids - a great chance to send your character in raids of past expansions in order to obtain gear with actual ilvl for Battle for Azeroth.
Black Temple Timewalking - Black temple is the penultimate raid in expansion World of Warcraft the Burning Crusade, in which there is a canonical character Illidan Stormrage. Beside offering the same looks available in the original Black Temple instance, there's also a new surprise in the Timewalking version of the raid. Any player who have obtained Warglaives of Azzinoth in ANY character on their account, accomplished by looting the The Twin Blades of Azzinoth at the Original Black Temple Raid, upon defeating Illidan in the Timewalking version of the raid on ANY character, will be rewarded with the achievement I'll Hold These For You Until You Get Out, which unlocks a new Demon Hunter-only exclusive account-wide transmog that resembles the look of the Legendary Warglaives Warglaive of Azzinoth/ Warglaive of Azzinoth. This is the first legendary item look that you're able to transmog to.
Ulduar Timewalking - Ulduar was one of the most popular raids in WoW WotLK, in the depths of which the ancient god Yogg-Saron.