Heart of Hruggek

Prerequisite: Bugbear, Githyanki
Heart of the a true warrior, you carry the spirit of Hruggek into battle:

• Increase a Mental (Int, Wis, or Cha) score by 1.
• You have advantage on saving throws against being charmed, frightened, paralyzed, poisoned or stunned.
• You can't be magically put to sleep.
• You double your proficiency bonus for all Stealth skill checks.