Calcite Shell. The Calcioptera's shell is made of a dense, mineral enriched calcium. While very sturdy, and nearly impervious to piercing and slashing damage, it is vulnerable to bludgeoning weapons. If the Calcioptera takes any bludgeoning damage while its hit point value is equal to or less than 82, the Calcite Shell breaks triggering its mythic trait. The Calcioptera's AC is now 14, all Vulnerabilities and Resistances are removed, its walk speed is now 45 feet, and it may now use its Mythic Actions. The Calcioptera acts on the turn immediately after the triggering of its Mythic Trait. The Calcite Shell will fully reform in 2d8 days after it has been broken.
Charge. If the Calcioptera moves at least 20 feet straight toward a target and then hits it with a gore attack on the same turn, the target takes an extra 9 (2d8) bludgeoning damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.
Multiattack. The Calcioptera makes two Gore Attacks.
Gore. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 6) bludgeoning damage.
Sweeping Claw (Recharge 5-6). Cone 15 ft. The long claws of the Calcioptera swipe out, all creatures in a 15 foot cone in front of the Calcioptera must succeed on a DC 17 Dexterity saving throw or take 22 (3d10 + 6) slashing damage, or half as much on a successful saving throw.
Unsettling Leer. The Calcioptera may use its Bonus Action to raise its shell, revealing the massive skull-like carapace. All creatures who can see the Calcioptera when it attempts this must succeed on a DC 15 Wisdom saving throw or become frightened of the Calcioptera until the end of their next turn. If the Calcite Shell is broken, the Calcioptera may not use this ability.
Regeneration. The Calcioptera may only use this ability after its shell is broken. The Calcioptera focuses on speeding up the reformation of its shell, regaining 2d6 hit points. If a 6 is rolled on either die the AC of the Calcioptera increases by 1, to a maximum of 2.
Bony Fortress. If the Calcioptera takes bludgeoning damage it may use its reaction to reenforce its shell, giving disadvantage on the next attack against it. If the Calcite Shell is broken, the Calcioptera may not use this ability.
Scream of the Damned. The Calcioptera may only use this ability after its shell is broken. When the Calcioptera takes damage, it may raise its head and unleash a blood curdling screech. All creatures within 150 ft. that can hear the Scream must succeed on a DC 15 Wisdom saving throw. On a failed save a creature takes 2d6 psychic damage.
Flurry of Claws. The Calcioptera makes two Sweeping Claw attacks without having to recharge.
Calcite Mist (Costs 3 Actions). The Calcioptera releases a miasma of minerals and calcium in a 30 foot cone in front of it. All creatures in the mist must make a DC 15 Constitution saving throw. On a failed save, the creature magically begins to turn to stone and is restrained. It must repeat the saving throw at the end of its next turn. On a success, the effect ends. On a failure, the creature is petrified until freed by the greater restoration spell or other magic.
Fly (Costs 2 Actions). The large, billowing wings of the Calcioptera spread and it takes flight, moving up to 30 feet without provoking attacks of opportunity.
Description
Calcioptera are a rare, ancient, solitary kind of beetle that can be found in the hottest and most barren deserts or the deepest darkest caverns. Its uncanny ability to absorb the calcium and minerals in the environment around it aids in the formation of the large dome of bone and rock on its back. Also known as Behemoth Heads, the Calcite Shell that they form looks remarkably like a skull.
Though Calcioptera are largely docile and won't attack unless provoked, it is all too often to hear of a band of adventurers seeking one out for the untold gems and ores that populate the rock and bone of its shell. However, many tales speak of the horrific fate awaiting anyone who manages to break the shell of a Calcioptera.
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