Deathwisp

The deathwisp flickers in and out of sight, and ranged weapon attacks against it are made with disadvantage.

The deathwisp can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside a solid object.

A deathwisp can travel between shadows as if by means of dimension door. This magical transport must begin and end in an area with at least some shadow. A shadow fey can jump up to a total of 40 feet per day; this may be a single jump of 40 feet, four jumps of 10 feet each, etc. This ability must be used in 10-foot increments.

While in sunlight, the deathwisp has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Animals do not willingly approach within 30 feet of a deathwisp, unless a master makes a successful DC 15 Wisdom (Animal Handling) check.

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 36 (7d8 + 5) necrotic damage.

The target must succeed on a DC 15 Constitution saving throw, or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

The deathwisp targets a humanoid within 10 feet of it that died violently less than 1 minute ago. The target's spirit rises as a wraith in the space of its corpse or in the nearest unoccupied space. This wraith is under the deathwisp's control. The deathwisp can keep no more than five wraiths under its control at one time.