WoWDB

Wowhead comparison of Dreadsoul set items that display on the character. Click the down arrow next to the eye and choose View in 3D. To see the wand instead of the staff, drag the staff out of the column and drop into the wand's column; then drag the wand to the column with the gear. Choose View in 3D again.

It is speculated that 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).

*As of Patch 5.3, all items exclusive to the SoR promotion (minus the deprecated Relic-type items) are now purchasable from vendors in Cataclysm starting zones in order to bridge an item level gap between Wrath of the Lich King and Cataclysm content. Sweet, sweet vindication after all this time.