Black Arrow

3rd-level Necromancy
Casting Time: 1 bonus action
Range: Self
Components: V
Duration: (C) 1 minute

The next time you hit a creature with a ranged weapon attack during this spell's duration, your weapon is coated with a dripping black shadow, and the attack deals an extra 4d10 shadow damage to the target. It ends early if you cast it again or cast another smite spell, such as shackling smite or ensnaring strike.
If the target is reduced to 0 hit points, it must make a Constitution saving throw. On a failure, it dies and is raised as a skeleton that is permanently under your command, following your verbal orders to the best of its ability.
At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.

Source: Homebrew