Reptilian Regeneration!

Prerequisite: Lizardfolk

You live a dangerous lifestyle, and your body had to adapt to survive, allowing you to heal grievous wounds.

Every hour you regain a number of hit points equal to half your proficiency bonus (rounded down), as long as you have at least 1 hit point or you are stabilized with 0 hit points. This way you can also regrow lost body parts, the time required depends on the lost body part (for example, 1d4 days for a finger, 1d4 weeks for an arm or leg).

As a bonus action, you can release a surge of regeneration in your body. You regain a number of hit points equal to 2d6 + your level. You can't regain hit points this way again until you finish a short or long rest.