Umbra

A melee weapon you are touching is imbued with the essence of the shadowfell. For the duration, coalescing shadows cling to the weapon. The weapon becomes magical and deals an additional 1d4 necrotic damage on a successful hit. The spell ends if you cast this spell again or if you let go of the weapon.

At Higher Levels. This spells damage increase by 1d4 when you reach 5th level (2d4), 10th level (3d4), 15th level (4d4), and 20th level (5d4).