Brood Mother Wyvern

Rending Screech: During the first round of combat, everyone within 60 ft. Of the Wyvern must make a DC 14 Wisdom saving throw or be shaken for the next minute. Shaken targets take a -2 to Attack Rolls, Saving Throws, and Ability Checks. As an action, you may try and steady yourself and re-attempt the save. 

 Wyvern Fury: When the Wyvern reaches 75 hit points, it will fly into a rage and immediately attack with two Bites/Claws and one Stinger on the nearest targets. This set replaces it’s previous Multiattack. 

Multiattack. The wyvern makes two attacks: one with its bite and one with its stinger. While flying, it can use its claws in place of one other attack.

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 5) piercing damage.

Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 5) slashing damage.

Stinger. Melee Weapon Attack: +8 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage. The target must make a DC 15 Constitution saving throw, taking 24 (8d6) poison damage on a failed save, or half as much damage on a successful one.

Airborne Grasp: While flying, Wyvern may make a contested grapple check on a medium creature or smaller. If the target fails to beat the Wyvern in an opposed athletics check on its turn, the wyvern may use its bonus action to restrain the target.

1 Legendary Action, refreshes each round of combat.

Wing Blast: All targets in a 10 foot wide, 30 foot long line must make a DC 15 Strength saving throw or be knocked up to 30 feet back. If they hit any wall or stalactite they take 2d6 points of damage bludgeoning damage.

Stalactite Drop: When a target moves within 10 feet of the Wyvern, it may swipe a stalactite from the ceiling, causing it to fall on the target. DC 13 Dex save to take half damage, or take 3d6 bludgeoning and be prone and restrained. DC 15 Athletics check to push off the Stalactite.