Boneclaw+

Rejuvenation. While its master lives, a destroyed boneclaw gains a new body in 1d10 hours, with all its hit points. The new body appears within 1 mile of the boneclaw’s master.

Shadow Stealth. While in dim light or darkness, the boneclaw can take the Hide action as a bonus action.

Maniacal Laugh. If the Boneclaw reduces a creature to 0 hit points on its turn, it can use Maniacal Laugh as a bonus action.  Each enemy of the Boneclaw that is within 60 ft. of it and can hear must succeed on a DC 14 Wisdom saving throw or be frightened of the Boneclaw for 1 minute. A creature may repeat the saving throw at the end each of its turns, ending the effect on a success.  If a creature's saving throw is successful or the effect ends for it, the creature has advantage on any subsequent saving throws to resist the effect of the Boneclaw's Maniacal Laugh.

Multiattack. The boneclaw makes two claw attacks.

Piercing Claw. Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 23 (3d12 + 4) piercing damage. If the target is a creature, the boneclaw can pull the target up to 10 feet toward itself, and the target is grappled (escape DC 14). The boneclaw has two claws. While a claw grapples a target, the claw can attack only that target.

Shadow Jump. If the boneclaw is in dim light or darkness, each creature of the boneclaw’s choice within 5 feet of it must succeed on a DC 14 Constitution saving throw or take 34 (5d12 + 2) necrotic damage.

The boneclaw then magically teleports up to 60 feet to an unoccupied space it can see. It can bring one creature it’s grappling, teleporting that creature to an unoccupied space it can see within 5 feet of its destination. The destination spaces of this teleportation must be in dim light or darkness.

Deadly Reach. In response to a visible enemy moving into its reach, the boneclaw makes one claw attack against that enemy. If the attack hits, the boneclaw can make a second claw attack against the target.

The Boneclaw can take 2 Legendary Actions choosing from the list below. The Boneclaw regains spent legendary actions at the start of its turn.

Claw Attack. The Boneclaw may make one Piercing Claw attack.

Shadow Step. When in dim light or darkness, the Boneclaw may teleport up to 60 feet to an unoccupied space it can see that is also in dim light or darkness.

Shadow Strike (Costs 2 Actions). When in dim light or darkness, the Boneclaw may teleport up to 30 feet to an unoccupied space it can see that is also in dim light or darkness.  It may then make a Piercing Claw attack against a creature within reach.  The attack is with advantage if the creature is frightened of the Boneclaw.