Coralblade

Coralball. The Coralblade can roll up into a ball of coral with sharp coral pieces sticking out. This allows it to hide whenever it is near coral and it cannot be seen unless the thing trying to spot it succeeds on a DC 16 (Wisdom) Perception check.

Spellcasting. The Coralblade can cast the ritual spell Locate Animals or Plants as a ritual. This ritual takes 10 minutes to perform. However, it does not need bloodhound fur to cast it. Instead it just requires a piece of coral from a reef. Other than that, the Coralblade cannot use magic.

Ink Squirt. The Coralblade can hold out its hands and small octopuses emerge from holes in the Coralblade's hand squirting ink on every thing within a 10 ft sphere. If a creature is hit by the ink/moves into it on its turn/starts its turn there, it will have to make a DC 14 Constitution saving throw or else it will be blinded or paralyzed (DM's choice) and takes 1d6 acid damage per turn there until it leaves the ink cloud or the ink cloud fades.

Coral Slam. Melee Weapon Attack: +6 to hit, reach 5 ft.,  1 target. Hit: 11 (2d8 + 3) Bludgeoning damage. 

Coral Rain. Ranged Weapon Attack: +7 to hit, range 20/60 ft., 1 target. Hit: 15 (2d12 + 3) piercing damage.

Multi Attack.  The Coralblade can attack thrice on its turn if it takes the attack action including its Ink Squirt

As a bonus action the Coralblade can roll up into a ball with spikes on it. This allows it to move double its speed, costing it its ability to use its melee attack but it can turn back using another bonus action.

Protective Coral. After taking 15 damage, the Coralblade can grow a extra layer of coral that protects it from taking piercing damage. After the Coralblade takes 20 damage on a single turn, the coral breaks and for the next 10 minutes the Coralblade is vulnerable to piercing damage whenever it is dealt.

Not Legendary

Not Mythic