Quick Hunter. The Crowlock doesn't provoke opportunity attacks when it runs out of an enemy's reach.
Perfect Mimicry. The Crowlock can mimic any sounds it has heard, including a persons voice. A creature that hears the sound can tell they are imitations with a successful DC 14 Wisodm (Insight) check.
Creature of Darkness. The Crowlock gets a +2 on its death saving throws.
Beak Bite. Melee Weapon Attack: +6 to hit, reach 5 ft.. 1d4 + 5 piercing damage.
Claw Attack. Magic melee weapon attack. +6 to Hit. 5 ft. range. Two attacks per Round, each dealing 1d4+3 damage.
Mind Piercer. Ranged Spell Attack. +4 to hit, range 60 ft. One creature takes 1d10 psychic damage.
Paralyzing Glare. The Crowlock focuses all of it's eyes on a single target in 30 ft range. The target has to make a DC 14 Saving Throw or be stunned. The target can try to get rid of the condition on it's turn the next round.
2/Long Rest: Retribution. After being hit by an attack (melee or ranged), the Crowlock can take no damage, absorb the energy of the attack instead and release it against a visible target in range (30ft).