Eighthbon - Sickskin

Their nicknames goes only as far as their complexion for the Eighthborn. Depending on the environment their can skin be a deep green to a tanned orange. A naturally muscular race, though it still needs to be fostered. They are one of the taller Borns as well but by no way an extreme. Typically they have pointed ears but also have tusk like lower canines. They have a generally stronger constitution than the other Borns though their skin tone can hint at perhaps what hostile environment or challenges their body had been attuned to. Pureblood

+2 Constitution
Bulwark Constitution: Eighthborn have perhaps the strongest immune system of any Born, whether that was natural or perhaps from their initial difficulties when integrating into civilization. Regardless of it's origin purebloods when resisting any form of disease or poison can choose to be afflicted or if resisting gain double their proficiency modifier regardless of other modifiers.
Situational Survival: Eighthborn may (Proficiency Modifier) times per week acclimate their body to an environment, all poisons natural in the acclimated environment automatically deal half damage and if the resist is succeeded take not only no damage but heal the damage the poison would of done. When not acclimated to any environment the body naturally hardens itself offering temporary health point equal to (Constitution Modifier or Wisdom Modifier x Proficiency Modifier x 2) and is fully recovered during any short rest.

Halfblood

+1 Constitution
Adaptive Wounds: A halfblood Eighthborn lacks much of the environmental adaptive ability of their pureblooded counterpart however their bodies have the exceptional attribute of being able to quickly heal. During their turn as a bonus action they can choose to expend up (Proficiency Modifier/2) hit die to heal the rolled amount. This ability can be used (Constitution Modifier or Wisdom Modifier) times per day.