Carcinoss Sharpclaw

Amphibious. The carcinoss can breathe air and water.

Multilegged. The carcinoss has advantage on saving throws to resist being moved against its will or being knocked Prone.

Multiattack. The sharpclaw makes two attacks with its Claw, Spear, or both.

Claw. Melee Attack Roll: +7, reach 5 ft. Hit: 11 (2d6 + 4) Piercing damage, and the target is Grappled (escape DC 15). The carcinoss has two claws, each of which can grapple only one target.

Spear. Melee or Ranged Attack Roll: +7, reach 5 ft. or range 20/60 ft. Hit: 11 (2d6 + 4) Piercing damage, or 13 (2d8 + 4) Piercing damage if used in two hands to make a melee attack.

Reinforce (3/Day). The sharpclaw can choose to present the most fortified part of its shell against attackers, gaining a +3 bonus to its AC until this trait causes an attacking creature to miss. If this trait causes the attack to miss, that section of shell is cracked, and the next time the sharpclaw uses this trait, it gains a +2 bonus to their AC, and a +1 bonus to its AC the third time it uses this trait.

Solid Shell. Trigger: The carcinoss is hit by a melee attack. Response: The damage is reduced by half (rounded down), and the other half is reflected, turning the attacker into the target.