The Great Conductor is a Sorcerer cosmetic set  introduced during Belial’s Return; includes

• Conductor’s Amplifier (chest)
• Conductor’s Conduit (helm)
• Conductor’s Grounding (boots)
• Conductor’s Instruments (gloves)
• Conductor’s Robes (pants)
• Lightning’s Muse (two-handed sorcerer staff)
• Melodious Rings (focus)
• Symphony of Storms (marking)