Starfinder SRD >Feats >General Feats >

Diehard

You are especially hard to kill. Your wounds quickly stabilize when you’re grievously wounded.

Benefit: When you are dying, you can spend the required Resolve Points to stabilize and 1 Resolve Point to stay in the fight (regaining 1 Hit Point) in the same round.

Normal: You must use Resolve Points to stabilize and to stay in the fight in separate rounds.