Let’s leave the warlock for a second and move on to the fighter. It’s nitch, but this is something that the battle master might want.
You are a master of combat who is fueled by death. Gain the following:
- Increase your Dexterity or Strength by 1, to a maximum of 20.
- Add 1 to your superiority dice.
- When you kill an enemy, regain one superiority dice instantly. There is no limit to the number of superiority dice you can gain this way, up to your maximum number.