Xur'ios

Xur'ios is an ethereal vendor that can be found at the Antonidas Memorial in the Broken Isles version of Dalaran.

Sells
The exact items available from Xur'ios are randomly selected each day.

In Hearthstone
Xur'ios appears as HS Xur'ios (one of the bosses) that can be encountered in the HS Dalaran Heist single-player experience in the Rise of Shadows expansion for Hearthstone.

Trivia

 * Xur'ios and his items are a reference to Xûr from the game.