Exanimate Specter

You throw the bones of a dead creature and necrotic energy is infused creating a specter within range that lasts for the duration or until you cast this spell again. When you cast the spell, you can make a melee spell attack against a creature within 5 feet of the specter. On a hit, the target takes force damage equal to 1d6 + your spellcasting ability modifier. As a bonus action on your turn, you can move the specter up to 20 feet and repeat the attack against a creature within 5 feet of it. The specter takes the form that it had as it was living, However it is held together with necrotic energy, and the bones are clearly visible.