Shadow Weapon

1st-level evocation
Casting Time: 1 action
Range: Self
Components: V
Duration: 1 minute
Classes: Bard, Ranger, Sorcerer, Wizard
You grasp the darkness around and fuse it into a shadowy black weapon. It counts as a normal weapon, except it deals necrotic damage instead of its normal damage type. If you let go of the blade, it disappears.
At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, increase its duration by 1 minute per each slot level above 1st. If you cast this spell using a spell slot of 3rd level or higher, the weapon gains a +1 bonus to attack and damage rolls for every two slot levels above 1st, up to a maximum of +3.