Ancient Thryx

Darkvision. 

Echolocation. The Thryix as young as a hatchling can produce a clicking sound, allowing people who have seen adult thyrix to use the phrase "if you can hear it, it can see you" to explain this ability.

Ancient Thryixian Shriek (Recharge 15-16). The young thyrix can produce an ear-piercing shriek that forces the opponent to roll a DC 20 Constitution saving throw, on a success nothing happens but on a fail, the creature takes 2d20 thunder (sound) damage and gains the frightened condition.

Action Name. Claws.

Action Melee Attack. Melee Weapon Attack: +5 to hit, reach 5 ft. Hit: (5d20) slashing damage.

Action Name. Stinger.

Action Melee Attack. Melee Weapon Attack: +5 to hit, reach 5 ft. Hit: (3d20) piercing damage plus 3d20 poison damage

Action Name. Bite.

Action Melee Attack. Melee Weapon Attack: +5 to hit, reach 5 ft. Hit: (6d20) piercing damage plus 2d20 poison damage

Action Name. Healing Spit.

Action. Upon using this ability the creature heals 5d20 health

Action Name. Multiattack.

Action. The thryix can use 2 of its attacks in one turn

Tail. Melee Weapon Attack: +19 to hit, reach 20ft., one target. Hit 24 (4d6 + 10) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be knocked prone.

The thyrix can use the disengage and hide action as a bonus action on its turn.

Opportunity Attack.

The Ancient Thryix can use 5 legendary actions.

Attack. The Ancient Thryix makes any attack it can.

Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.