Cave Blindness. The cave wyvern can only see via its blindsight by using echolocation. If the cave wyvern is deafened, it is also blinded.
Multiattack. The cave wyvern makes two venomed bite attacks. If it is flying, it can replace one bite attack with a claw attack.
Venomed Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., 1 target. Hit: 11 (2d6+4) piercing damage and the target must succeed on a DC 14 Constitution saving throw. On a failure, the takes 15 (5d6) poison damage, or half as much on a success.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., 1 target. Hit: 14 (2d8+4) slashing damage. If the target is size Medium or smaller, it needs to make an opposed strength check against the wyvern or be grappled. A grappled creature can use its action to make another opposed strength check to escape.
Hypersonic Screech (Recharge 5-6). The cave wyvern lets out an earsplitting screech in a 40 ft. cone. Each creature in the area must make a DC 16 Constitution saving throw or take 24 (6d8) thunder damage and be stunned until the end of the cave wyvern's next turn. On a success, the creature takes half damage and is not stunned.
Description
This large wyvern makes its home in the caves and caverns beneath the world. Adapted to centuries in the darkness, its eyes have completely devolved and disappeared, now relying on large ears and supersonic chirps to echolocate around the underdark. This highly developed sense of echolocation can also be used to stun its prey with high-pitched sounds, leaving it vulnerable to the dragon's attacks. Highly territorial, cave wyverns viciously attack one another to defend their subterranean domain.
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