Dexterity Orb +

From Everafter Falls Wiki

Dexterity Orb + is an orb that can be inserted into any empty equipment slot to grant it an additional +18 Attack Speed bonus. Once slotted in, a Dexterity Orb + can only be removed by destroying the equipment it is attached to in the Workshop Furnace.

Dexterity Orb + can be obtained as a rare random drop from treasure chests in the dungeons or crafted in the Giant Furnace for 3,000 by smelting the following items:
Dexterity Orb (3)
Mythril Bar (10)
Orb Syrup (1)