Shadow Spirit

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.

The spirit may take the Hide action as a Bonus Action when in Dim Light or Darkness.

The spirit makes a number of attacks equal to half this spell's level (round down).

Melee Attack Roll: Bonus equals your spell attack modifier, Reach 5 ft. Hit: 1d8 + 3 + summonSpellLevel Cold damage.

Ranged Attack Roll: Bonus equals your spell attack modifier, range 150 ft. Hit: 2d4 + 3 + summonSpellLevel Cold damage. If the spirit was hidden when it made the attack, the attack deals an additional 2d4 Cold damage.