Restless Spirit

The spirit has advantage on any attack rolls against creature frightened of it.

You can add your PB to any ability check or saving throw that the spirit makes.

The Spirit sings a sorrowful song. A creature of your choice within 30 feet that can hear it must succeed on a Wisdom saving throw against your spell save DC or be frightened of the Spirit for 1 minute. The frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target. Hit: 8 (1d8 + 2 + PB) necrotic damage.