Evolved Perikin

You have meditated on your race's unnatural resilience, granting you incredible hardiness. You gain resistance to bludgeoning damage, as well as advantage on Constitution saving throws. In addition, whenever you roll a Hit Die to regain hit points, double the number of hit points it restores. You also regain hit points equal to your Constitution modifier at the start of each of your turns while not at 0 HP, up to half of your hit point maximum. Finally, any severed body parts grow back and return to full function after 7 days. If you have the severed part, it can be reattached during a short rest.

A creature which bites or consumes any part of your body must make a DC 30 Constitution saving throw or be attacked by your voracious, regenerative bodily tissues. Creatures who fail this save must make a DC 20 Constitution saving throw at the start of each day, or take 1 point of damage to their Strength score and 2 points of damage to their Constitution score. Creatures which are immune to disease instead have advantage on these saving throws. If either ability score reaches 0, the creature dies, and a perikin will sprout from its body, finishing gestation in 2d4 weeks. The number of perikin produced doubles for every size category above medium that the body belongs to. Perikin grow rapidly, becoming adults in 5 years. The perikin is friendly to you and your allies.

For more information on the "Perikin" race, please see my other shared homebrews.