Spear of Nikolai

This heavy brass spear measures nearly nine feet in length and is unnaturally heavy. If used with one hand the wielder has disadvantage to strike unless at least Large. It strikes as a Lance and by all rights should not be thrown. If thrown it actually launches itself, transforming into a 5' wide by 60' long bolt of lightning. If impeded it will bounce and continue to full distance, then return to spear form. Once discharged, the spear will remain inert for one day.