Undead Ghost(4th level)

Incorporeal Passage. The spirit can move through other creatures and objects as if they were difficult terrain. If it ends its turn inside an object, it is shunted to the nearest unoccupied space and takes 1d10 force damage for every 5 feet traveled.

Multiattack. The spirit makes a number of attacks equal to half this spell’s level (rounded down).

 Deathly Touch (Ghostly Only). Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one creature. Hit: 1d8 + 3 + the spell’s level necrotic damage, and the creature must succeed on a Wisdom saving throw against your spell save DC or be frightened of the undead until the end of the target’s next turn.