Copycat

Keen Hearing and Sight. The copycat has advantage on Wisdom (Perception) checks that rely on hearing or sight.

Light Sensitivity. While in bright light, the copycat has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Shadow-Born. While in dim light or darkness the copycat can take the Disengage or Hide action as a bonus action on each of its turns and has advantage on Dexterity (Stealth) checks.

Grim Connoisseur. The copycat has advantage on ability checks to identify creatures and recall lore about them.

Hollowing Glimpse. Ranged Spell Attack: +6 to hit, reach 30 ft., one target. Hit: 6 (1d4 + 4) necrotic damage. The copycat regains 1d4 hit points.

Macabre Mimicry (3/Day). The copycat targets one Tiny creature it can see within 30 feet of it. The target must succeed on a DC 15 Wisdom saving throw or be magically absorbed by the copycat. When absorbed, the target dissolves into dark dust and is being digested by the copycat. If the copycat dies while digesting a creature, the absorbed creature reappears in the copycat‘s space, drops to 1 hit point and is unconscious. Otherwise the absorbed creature ceases to exist after 8 hours.
While digesting a creature, the copycat gains all resistances, immunities and special traits of that creature. In addition, the copycat can use that creature‘s actions and reactions. If special appendages or body modifications are required for any of the features, they appear on the copycat as spectral manifestations representative of the absorbed creature.