Requirements: 18 Constitution
“Thick skulled, with a will of steel.”
You have advantage on any Save, Skill Check or d20 roll made for the purpose of not falling Unconscious.
You have advantage on saving throws made for the purpose of resisting becoming Stunned or Staggered.
Your minimum Torpor is reduced from 0 by your Constitution Attribute, going into the negatives, making you harder to knock Unconscious.
You can hold your breath for twice as long.
You can use broken limbs as if they weren’t broken.