Critical Healer

You are specially adept at restoring wounds, granting you the following benefits:

• Increase your Intelligence, Wisdom, or Charisma score by 1, to a maximum of 20.
• Whenever you restore hit points to a creature through a spell you cast or potion you feed, roll a d20. On a roll of 20, double how much healing the creature receives.
• Once per spell or potion, when you restore hit points to a conscious creature through a spell you cast or potion you feed, they regain additional hit points equal to your proficiency bonus.