Battle Master
Master Sophisticated Battle Manoeuvres
Battle Masters are students of the art of battle, learning martial techniques passed down through generations. The most accomplished Battle Masters are well-rounded figures who combine their carefully honed combat skills with academic study in the fields of history, theory, and the arts.
Level 3: Combat Superiority
Your experience on the battlefield has honed your fighting techniques. You learn Manoeuvre that are fueled by special dice called Superiority Dice.
Manoeuvre
You learn three different Manoeuvre of your choice from the "Manoeuvre Options" section. Many Manoeuvre enhance an attack in some way. You can use only one Manoeuvre per attack.
You learn two additional Manoeuvre of your choice when you reach Fighter level 7, 10, and 15. Each time you learn new Manoeuvre, you can also replace one Manoeuvre you know with a different one.
Superiority Dice
You have four Superiority Dice, which are d8s. A Superiority Die is expended when you use it. You regain all expended Superiority Dice when you finish a Short Rest or Long Rest.
You gain an additional Superiority Die when you reach Fighter level 7 (five dice total) and 15 (six dice total)
Saving Throws
If a Manoeuvre requires a saving throw, the DC equals 8 + your Proficiency Bonus + your Strength or Dexterity modifier (your choice).
Level 3: Student Of War
You gain proficiency with one type of Artisan's Tools of your choice, and you gain proficiency in one skill of your choice from the skills available to Fighters at level 1.
Level 7: Know Your Enemy
As a Bonus Action, you can discern certain strengths and weaknesses of a creature you can see within 30 feet of yourself; you know whether that creature has any Immunities, Resistances, or Vulnerabilities, and if the creature has any, you know what they are.
Once you use this feature, you can't do so again until you finish a Long Rest. You can also restore a use of the feature by expending one Superiority Die (no action required).
Level 10: Improved Combat Superiority
Your Superiority Die becomes a d10s.
Level 15: Relentless
Once per turn, when you use a Manoeuvre, you can roll a d8 and use the number rolled instead of expending a Superiority Die.
Level 18: Ultimate Combat Superiority
Your Superiority Die becomes a d12s.