Totem of the Crab

The Totem of the Crab is a new option for the Totem Warrior Subclass of the Barbarian. I've never seen a Crab Totem before, so here it is. The Totem of the Crab gives you a thick shell and aquatic features. Please note that you also gain the spirit seeker  feature by choosing this path.

Totem Spirit

At 3rd level, while raging, you gain resistance to bludgeoning, piercing and slashing damage from all sources. And you may use your reaction to reduce damage you take from any one source by your level. The Crab Totem grants you a thick shell and big claws, which can withstand impactful hits. You may do so a number of times equal to your proficiency bonus and regain all expended uses after a long rest. 

Aspect of the Beast

At 6th level, you gain a swimming speed equal to your walking speed and the ability to breathe underwater. Furthermore, you gain darkvision within a range of 60 feet.

Spirit Walker

At 10th level, you can cast the commune with nature spell, but only as a ritual. When you do so, a spiritual version of one of the animals you chose for Totem Spirit or Aspect of the Beast appears to you to convey the information you seek. 

Totemic Attunement

At 14th level, the spirit of the Crab makes you unstoppable. If any hostile creature forces you to make a saving throw, you add your rage damage to the save and your rage damage against that creature is doubled until the end of your rage. Furthermore, you can't be prone, grappled or moved against your will as long as you are conscious.