Thrallborn

Prerequisite: Native to a wounded land or bordering territory.

You and your ancestors were enslaved by horrific invaders from the lowest pits of the outer planes and forced into servitude, yet you endured it all despite their attempts to work you to death.

You gain advantage on checks for any one Intelligence (Nature), (Religion), Wisdom (Animal Handling), (Medicine), or (Survival) check. In addition, you gain advantage on saving throws against effects that would cause you to take on one or more levels of the exhaustion condition.

However, you have disadvantage on saving throws against mind-affecting effects used by fiends.

You must select this feat as a 1st-level character.