Carak Crabcake

Amphibious. The crab can breathe air and water.

Double Down. If Carak grapples one target with both claws, the target is restrained. 

Barnacle Inspiration: With a bonus action grant any character that can hear you a d8 inspiration that can be used on attack and damage rolls. If you fall to 0 while inspired you may use this inspiration as a reaction an heal yourself instead.

Sidekick. Prodigy Spellcaster

Potent Cantrips: The sidekick can add its spellcasting ability modifier to the damage it deals with any cantrip (+8)

Carak's spellcasting ability is Charisma (spell save DC 18, +8 to hit with spell attacks). It can innately cast the following spells, requiring no material components:

At will: shape water, guidance, frostbite

4/day: fog cloud, detect magic

3/day: warding wind, enhance ability, vortex warp

2/day: thunder step, create food and water, haste

1/day: mass cure wounds, 

Crustacean Rage: 2/day Carak can enter a rage. Halving all damage except psychic, +2 to melee attack damage. Cannot cast spells while raging.

Multi-attack: Carak can make two attacks using each of his claws. If either claw is preoccupied with a grapple, it can't be used to attack.

Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 4 (1d8+8) bludgeoning damage, and the target is grappled (escape DC 16). The crab has two claws, each of which can grapple only one target.

Crabhammer. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 4 (1d8+8) lightning damage.

Carak Cannon. Ranged Weapon Attack: +8 to hit, reach 30 ft., up to three targets. Hit: 8 (1d8+8) piercing damage.

As a reaction Carak can bring up his guard and cast shield once per short rest.