Arcanist Xorith

Arcanist Xorith is a blood elf of the Scryers found in southeast Bank of the Terrace of Light in Shattrath City. He sells specialized flasks only usable in raid zones to players who are with Cenarion Expedition, the Sha'tar, and the Scryers. The flasks can only be purchasable with tokens obtained from creatures in Tempest Keep: The Eye, The Serpentshrine Cavern, and the Black Temple.

Quotes
Only the most seasoned hunters of Illidan's minions gain access to my wares.
 * Gossip

You will be considered worthy when your status with the Sha'tar, Cenarion Expedition and the Scryers is exalted.