Wowhead comparison of Shadowstalking set items that display on the character. Click the down arrow next to the eye and choose View in 3D. To see the set with a weapon and/or shield, drag the weapon/shield out of its column and drop into the column with all the armor; drag out the weapon/shield before selecting a different weapon. Choose View in 3D again.
This is one of the sets available to characters that are boosted to level 80 under the revamped Scroll of Resurrection program. Most sets have more than one option for each slot to accommodate different specializations.Full list of sets created for this purpose: Beastsoul (hunter), Shadowstalking (rogue), Dreadsoul (warlock), Wildsoul (druid), Magesoul (mage, derp), Ebonsoul (death knight), Valiant (warrior), Zealous (paladin), Seraphic (priest), Stormbinder (shaman).
Somewhat oddly, this item is not included in the ilvl 232 vendor's inventory (unlike the rest of the set).