You are specially designed to withstand all damage that comes your way and absorb that which goes to your friends and increasing the affects of healing and temporary hit points at the cost of most of your damage output.

Level 3: A worthy sacrifice

Once choosing this path at third level your hit die becomes a d20 and you lose the ability to offensively use weapons but can wield 2 shields. You also gain proficiency in all armor and shields.

Level 7: Absorb

Once you get this at 7th level all healing and temporary hit points given to your are doubled in affect and whenever something within 60 ft of you takes damage you can redirect half of the damage to yourself.

Level 10: Healthy dodging

Starting at 11th level your dexterity modifier to AC is doubled even if you are wearing something that would limit it like plate armor, for example if you had 18 dexterity and you are wearing full plate you would still get plus 8 to AC and you gain advantage on every roll you make to increase your health at each level.

Level 15: Unlucky break

Once you gain this at 15th level if an enemy rolls a nat 1 on an attack roll against you, you can try and roll a strength check at disadvantage against the metals AC, if you succeed the weapon breaks.

Level 18: Immovable object

Once you reach 18th level you gain resistance to all damage, proficiency in all saving throws, and the ability to redirect 10 percent of all damage you take to something else.