这个Onyx Spear自制魔法武器是否适用于低等级（3-5）角色？

I'm building a unique weapon that can be looted off a boss creature in a very early portion of my campaign (expected for characters level 3-5), and I want to ensure that I can fairly hand it out to players without worrying about it being overpowered.I'm building a unique weapon that can be looted