You conjure a magical dark bow in your hands. For the duration, you gain proficiency with Shortbows while firing from this bow and you do not require ammunition. The bow deals 2d6 necrotic damage, and you use your spell attack bonus instead of dexterity to hit. Additionally, every creature hit by an attack with this bow must succeed on a Constitution Saving Throw or become poisoned until the end of their next turn. 

At Higher Levels. When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 3d6. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 4d6 and you gain the extra attack feature while firing from the bow. When you cast it using a spell slot of 7th level or higher, the damage increases to 5d6.