Barbarian

Your blood has been infected permanently with the terrors of the waste, and when you go into a rage you become feverish. You gain an unquenchable thirst as your eyes and ears begin to bleed, you can't bear to hold still and your urgency explodes ten fold, you become an unstoppable force of escalation.

When you choose this path, the power of your physiology is revealed.

Beginning level 3, when you choose this path, when you enter your rage, you gain a number of temporary hit-points equal to your Constitution Modifier + Barbarian Level + Proficiency. These extra hit points dissipate when you rage ends.

While raging,

• You may take a bonus action during each of your turns to heal one hit point.
• You may take an action to gain a number of temporary hit points equal to your barbarian level. You slice at yourself, letting old blood loose and new blood come to the surface, and so this action counts as a hostile action, and does not end your rage. These temporary hit-points gained his way count as your Bloodied Physiology, and you may not gain more than the total from that feature, but may refill your temporary hit-points to that point.

Your blood is concentrated, thick, and xenophobic, and is immune to foreign agents from entering.

You gain resistance to Disease and Poison, and have advantage against saving throws to do with Disease and Poison.

While Enraged, you are Immune to Disease and Poison.

When you kill a creature, or score a critical hit against a creature that has blood, you may take another Action and Move up to half your normal speed. This ability may only be used one per turn.