Master of Battle

Third level Fighters exhibit martial training that allows them to perform special combat maneuvers. You gain the following benefits:

• You learn a number of maneuvers equal to your Fighter level/3 + your Strength or Dexterity modifier of your choice from among those available to the Battle Master archetype in the fighter class. You can use only one maneuver per attack and you may swap out your maneuvers known after a long rest
• If a maneuver you use requires your target to make a saving throw to resist the maneuver's effects, the saving throw DC equals 8 + your proficiency bonus + your Strength or Dexterity modifier (your choice). 
• You gain 4 superiority die at level 3 with a die size of 1d8. You gain additional die and die size at higher levels: 6 1d10 die at Fighter level 10 and 8 1d12 die at Fighter level 18.  A superiority die is expended when you use it. You regain your expended superiority dice when you finish a short or long rest.