Copycat

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

Keen Hearing and Sight.  The copycat has advantage on 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 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 Stealth checks.

Macabre Mimicry (3/Day). The copycat targets one Tiny creature it can see within 30ft of it. The target must succeed on a DC15 Wisdom saving throw or be magically absorbed by the copycat. While being digested, the target leaves its space by dissolving into dark dust and being absorbed by the copycat. If the copycat dies while absorbing a creature, the victim 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 damage resistances, damage 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

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d4 + 5) slashing damage. 

Hallowing Glimpse. Ranged Spell Attack: +7 to hit, range 30 ft., one target. Hit: 7 (1d4 + 5) necrotic damage and the copycat regains 2 (1d4) hit points.