Martial Sword Master

If you are proficient with and wielding a shortsword, scimitar, rapier, or longsword, you can perform special combat maneuvers. You gain the following benefits:

• You gain 2 superiority die, which are d6 (these dice are added to any superiority dice you have from another source. If you have the Battle Master subclass, the die values change to match the Battle Master Superiority die). These die are used to fuel your maneuvers. A superiority die is expended when you use one. You regain your expended superiority dice when you finish a short or long rest.
• You learn the two combat maneuvers listed below. 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).
  • Pommel Stun: As a bonus action,  you can expend one superiority die to hit an enemy in 5ft range with the pommel of your sword. If you hit, the damage is the superiority die (and no other bonus damage). The target must succeed on a constitution saving throw or be stunned until the end of your next turn. Every time the target takes damage, they can roll the save again to end the stun early.
  • Deflecting Blade: When you are hit by a ranged weapon attack, you can expend one superiority die to use your reaction and deflect the missile. When you do so, the damage you take is reduced by your superiority die  + your character level + your Dexterity or strength modifier. If you reduce the damage to 0 or less, you slice the projectile out of the air, destroying it.