Adult Hive Dragon

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Hive Tactics. The hive dragon has advantage on an attack roll against a creature if at least one of the hive dragon's allies is within 10 feet of the creature and the ally isn't incapacitated

Wrist/Claw stingers. Not all Hive Dragons have stingers in wrists/claws. up to DMs discretion 

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 12 (2d10+ 7) piercing damage

Claw. Melee Weapon Attack: +14 to hit, reach 5ft., one target. Hit: 11 (2d8+6) slashing damage.

Claw with stinger. Melee Weapon Attack: +14 to hit, reach 5ft., one target. Hit: 11 (2d4+6) slashing damage. The target must make a DC 19 Constitution saving throw taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one. On a failed save the target is paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Tail. Melee Weapon Attack: +14 to hit, reach 15ft., one target. Hit:  (2d8+6) bludgeoning damage.

Tail stinger. Melee Weapon Attack: +14 to hit, reach 15ft., one target. Hit:  (2d8+6) piercing damage. The target must make a DC 19 Constitution saving throw taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one. On a failed save the target is paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Tail acid spray. Range Weapon Attack: +13 to hit, range 80/120 ft. Hit: 39 (8d10) acid damage.

Tail dart. range Weapon Attack: +13 to hit, range 30/60ft. Hit: 6 (1d4+4) piercing damage. The target must make a DC 19 Constitution saving throw taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one. On a failed save the target is paralyzed 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 19 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.

Retractable stinger. The dragon has stingers in its wrist/claws. 

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The dragon regains spent legendary actions at the start of its turn.

Detect. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 22 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.