Sword Master (5e Feat)
From D&D Wiki
You have mastered the use of the sword, giving you the following benefits:
- Increase your Strength or Dexterity score by 1, to a maximum of 20.
- You gain proficiency in two of the following weapons your choice: greatswords, longswords, rapiers, scimitars, and shortswords.
- When you score a critical hit with a greatsword, longsword, rapier, scimitar, or shortsword, you deal an extra 1d6 damage of the weapon's damage type, and you may make another weapon attack with that weapon as a bonus action.