Arcane Staff

The spell enchants one staff wielded by the caster, imbuing it with arcane power and precision.  The caster can make a melee spell attack with the weapon as part of casting the spell and each round thereafter to inflict 1d8 bludgeoning damage plus the caster's primary spellcasting modifier on a successful melee spell attack roll. The staff is considered a magical weapon. The arcane staff's damage increases by 3 at 5th level, by 6 at 11th level and by 9 at 17th level.