Dropped by Black Phantom Lord Rydell on 3-1, in pure black world tendency.
Two of these weapons held in either hand stacks for very quick mana regeneration (along with all other mana regeneration items). The two poles have to be upgraded to different levels to work, however. When fully upgraded, this weapon regenerates 1 mp/second. It's the only weapon in the game that resembles a (quarter) staff.