Great for RPing imo, my mage dabbles in the Armaggedon arts...

Edit: Why was I downrated? I don't see anything wrong with this comment...

Not to be mistaken for "Twilight Crappings" a series of books by Stephanie Meyer.

Twilight Cultist sets are used to summon Twilight Members from the Wind Stones around Silithus.

1 Set is required to summon from a Lesser Wind Stone.
Soloable

4 Sets are required to summon from a regular Wind Stone
(A: which is 3 Abyssal crests + 1 Set for the summon)
5Man

13 Sets are required to summon from a Greater Wind Stone
(which is A x3 = 3x Abyssal Signet + 1 Set for the summon)
20man+

All mobs will despawn if your party dies and waste your mats, so make sure you have a decent group.

Although you will need some Large Brilliant Shards for Other Mats like the Twilight Cultist Medallion and Twilight ring of Lordship which are used for the regular and Greater WindStones.

Overall its alot of grinding/mats/effort to put into it, but its well worth it imo.

This set is used multiple times in Silithus in order to summon various elite elementals from the stones in the camps of the Twilight Cultists. You need to wear all three pieces before using one of the stones. This will summon the elemental.

However, the elemental will not aggro immediately upon summoning, so that should give you a few moments to put your regular armor back on before the actual battle.

For a certain reason, everything with a name that involves "Twilight" suddenly became much less cool.

This set cant be disenchanted.

The quests associated with the Twilight Trappings appear to have been removed from the game.

NOTE FOR THOSE DO NOT READ THE ABOVE GOOD POSTS: These linked items/spells/usage are no longer valid for quests post-Cataclysm. It is supposedly safe to disenchant, sell, or toss the required items (per two different in-game GMs, though a third did say maybe there will be use for them but he wasn't certain AT ALL of this).

They were originally used specifically for the various Silithus quest chains to create various elemental scepters/crests/signets, which had required these randomly annoying drop items (Twilight Cultist Mantle, Twilight Cultist Robe, and Twilight Cultist Cowl) along with the (Item #20422)/(Item #20451) to summon various quest-only elemental Templar/lords (no longer in the game or this site), often leading to another summoning quest or chain elsewhere. The main quest items stemming from dropped (Item #20469).

The entire set of Silithus quest chains were all broken when Blizzard rushed the development of the Cataclysm expansion without deciding on how to renovate the Silithus zone to match changes in Cata (hence many of the basic quests here are still from pre-WotLK coding), to include the Temple of Ahn'Qiraj. Instead they focused on the new story lines in the graphically-sweet Cata zones and how to change the raid system cross-server.

*edit to add that as of patch 4.3 these items are STILL no longer valid for quest chains. They do sometimes still randomly drop from NPCs or are in players' banks, but aside from looks or collecting are useless compared to similar level quest gear since Cata. Not a reason to downvote extremely valid information though.