Toxin Metabolizer

You gain the following benefits.

Ability Score Increase. Increase your Constitution score by 1, to a maximum of 20.

Poison Resistance. You have Resistance to Poison damage and Advantage on saving throws to avoid and end the Poisoned condition.

Toxin Metabolism. When you take Poison damage or succeed on a saving throw to avoid or end the Poisoned condition, you can expend a Hit Point Die (no action required), roll it and add your Constitution modifier to it. You regain Hit Points equal to the total (minimum of 1 Hit Point).