Giant Reefback Crab

Traits

• Amphibious: The reefback crab can breathe air and water.
• Cloud Diver: The reefback crab can swim through clouds as if it were water.
• Rock Shell: The rock crab's shell it made out of an actual rock. Dealing 40 points of bludgeoning damage destroys the rock and lowers the crab's armor class to 13. Also when the reefback crab's body is submerged in the ground or clouds, it looks like an ordinary rock and takes a DC 18 Perception check to notice it unless familiar with the reefback crap.
• Calming Habitat: Medium or smaller creatures native to the reefback crab’s environment do not act hostile against the crab unless provoked by it and have advantage on mental saving throws against being forced to attack the reefback crab. Additionally, any such creatures will turn aggressive to creatures attacking the reefback crab.

Actions

• Multiattack: The reefback crab makes 2 attacks, one claw smash and 1 claw grab.
• Claw Smash: Melee Attack Weapon. +6 to hit. Deals 2d8+4 points of bludgeoning damage.
• Claw Grab: Melee Attack Weapon +6 to hit. Deals 2d6+4 points of piercing damage. The targeted creature makes a Strength Saving Throw (DC 15) or be grappled by the reefback crab. The grappled target can repeat the saving throw at the end of their turn or on their action. Any grappled targets automatically take 2d6+4 points of piercing damage if the reefback crab decides to use the Claw Grab on it again. The reefback crab can only have 2 targets grappled at once, it then loses the ability to grapple until 1 of the 2 breaks free.
• Produce Clouds: Once per long rest, the reefback crab may create a 30 ft. radius cloud centered on its current location. The cloud spreads around all corners and the area it covers becomes heavily obscured. A strong wind can dispurse the cloud.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	10 (+0)	18 (+4)	5 (-3)	12 (+1)	3 (-4)

Type: Large Beast, Neutral
Armor Class: 17
Hit Points: 71 (6d10 + 24)
Speed: 30 ft., swim 15 ft.
Proficiency: +2
Saving Throws: CON +6
Damage Resistance: Slashing
Senses: Tremorsense 60 ft.
Languages: -
Challenge: 4 (1,100 XP)