Voidspawn Winged Panther

Flyby. The voidspawn winged panther doesn't provoke an opportunity attack when it flies out of an enemy's reach.

Magic Resistance. The voidspawn winged panther has advantage on saving throws against spells and other magical effects.

Radiant Consumption. Whenever the voidspawn winged panther is subjected to radiant or necrotic damage, it takes no damage and instead regains a number of hit points equal to the radiant or necrotic damage dealt.

Keen Smell. The voidspawn winged panther has advantage on Wisdom (Perception) checks that rely on smell.

Dive Attack. If the voidspawn winged panther is flying and dives at least 30 feet straight toward a target and then hits it with a melee weapon attack, the attack deals an extra 9 (2d8) damage to the target.

Familiar Bond. The voidspawn winged panther can serve another creature as a familiar, forming a magical, telepathic bond with its willing master. While the two are bonded, the master can sense what the winged shadow panther senses, as long as they are within 1 mile of each other. Additionally, while the bonded pair are within 100 feet of each other, they can communicate telepathically. Beyond this 100 feet, and up to a mile, the two share an empathetic link, in which they can communicate emotions and basic ideas to one another, but no words.  

Multiattack. The voidspawn winged shadow panther makes up to three attacks: one with its bite, and either two with its claws or one with its' tail or, if a creature is grappled by the voidspawn winged panther, it may attempt to recharge and use void drain.

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 5 (1d8 +6) piercing damage plus 14 (4d6) necrotic damage.

Claw. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 4 (2d4 + 6) slashing damage.

Tail. Melee Weapon Attack: +10 to hit, reach 15 ft., one target. Hit: 21 (2d8 + 6) radiant damage. Hit: The target is grappled (escape DC 18). The voidspawn winged panther can only grapple one creature in this way at a time.

Void Drain. (Recharge 5–6). The voidspawn winged panther drains one creature it is grappling. This creature must make a DC 17 Constitution saving throw, taking 45 (10d8) necrotic damage on a failed save, or half as much damage on a successful one. If the target is a creature, its hit point maximum is reduced by an amount equal to the damage taken. The target dies if this attack reduces its hit point maximum to 0. The reduction lasts until removed by the greater restoration spell or other magic.

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