Runes of Magic Wiki
Sleepwalker Accessory Item Set (Required Level: 55)
AccessorySet Notes
Sleepwalker Accessory (3) Accessory
Sleepwalker Necklace (RW/Ggl)
Sleepwalker Earrings (RW/Ggl)
Sleepwalker Ring (RW/Ggl)
Needed for Item-Set Skill: 3
Spirit Herb Essences (All Classes)
Elemental Spirit Stone Essence (All Classes)
Energy Restore (All Classes)

Sold by Nabod Klein in Dalanis Central District.
See also: Item Set Skills for a table of all Items Sets, by class, and what extractable skills they have.