Battle Master (5A)

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This is a Fighter subclass for 5A.

Those who emulate the archetypal Battle Master employ martial techniques passed down through generations. To a Battle Master, combat is an academic field, sometimes including subjects beyond battle such as weaponsmithing and calligraphy. Not every fighter absorbs the lessons of history, theory, and artistry that are reflected in the Battle Master archetype, but those who do are well-rounded fighters of great skill and knowledge.

Greyhawk: Battle mastery is not some ancient lost art, it is new and fresh and alive and well and constantly growing. Warriors study these techniques in schools, as gladiators, in the military, and in hundreds of the more progressive castles all over the Flanaess. Most battle masters are human, but cosmopolitan members of other races also study the modern art of war.

Source: Player's Handbook

Class features

Combat Superiority

When you choose this archetype at 3rd level, you learn maneuvers that are fueled by special dice called superiority dice.

Maneuvers. You learn three maneuvers of your choice. Many maneuvers enhance an attack in some way. You can use only one maneuver per attack. You learn two additional maneuvers of your choice at 7th, 10th, and 15th level. Each time you learn new maneuvers, you can also replace one maneuver 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 of your expended superiority dice when you finish a short or long rest. You gain another superiority die at 7th level and one more at 15th level.

Saving Throws. Some of your maneuvers require your target to make a saving throw to resist the maneuver's effects. The saving throw DC is calculated as follows:

Maneuver save DC = 8 + your proficiency bonus + your Strength or Dexterity modifier (your choice)

Student of War

At 3rd level, you gain proficiency with one type of artisan's tools of your choice.

Know Your Enemy

Starting at 7th level, if you spend at least 1 minute observing or interacting with another creature outside combat, you can learn certain information about its capabilities compared to your own. The DM tells you if the creature is your equal, superior, or inferior in regard to two of the following characteristics of your choice:

• Strength score
• Dexterity score
• Constitution score
• Armor Class
• Current hit points
• Total class levels, if any
• Fighter class levels, if any

Improved Combat Superiority

At 10th level, your superiority dice turn into d10s. At 18th level, they turn into d12s.

Relentless

Starting at 15th level, when you roll initiative and have no superiority dice remaining, you regain 1 superiority die.

Battle Master Maneuvers

Ambush

When you make a Dexterity (Stealth) check or an initiative roll, you can expend one superiority die and add the die to the roll, provided you aren't incapacitated.

Bait and Switch

When you're within 5 feet of a creature on your turn, you can expend one superiority die and switch places with that creature, provided you spend at least 5 feet of movement and the creature is willing and isn't incapacitated. This movement doesn't provoke opportunity attacks.

Roll the superiority die. Until the start of your next turn, you or the other creature (your choice) gains a bonus to AC equal to the number rolled.

Brace

When a creature you can see moves into the reach you have with the melee weapon you're wielding, you can use your reaction to expend one superiority die and make one attack against the creature, using that weapon. If the attack hits, add the superiority die to the weapon's damage roll.

Commander's Strike

When you take the Attack action on your turn, you can forgo one of your attacks and use a bonus action to direct one of your companions to strike. When you do so, choose a friendly creature who can see or hear you and expend one superiority die. That creature can immediately use its reaction to make one weapon attack, adding the superiority die to the attack's damage roll.

Commanding Presence

When you make a Charisma (Intimidation), a Charisma (Performance), or a Charisma (Persuasion) check, you can expend one superiority die and add the superiority die to the ability check.

Disarming Attack

When you hit a creature with a weapon attack, you can expend one superiority die to attempt to disarm the target, forcing it to drop one item of your choice that it's holding. You add the superiority die to the attack's damage roll, and the target must make a Strength saving throw. On a failed save, it drops the object you choose. The object lands at its feet.

Defensive Shove

As a bonus action, you can expend a superiority die to shove an adjacent friendly creature out of harm’s way. It moves 10 feet in the direction of your choice, and until the start of your next turn, it can add the superiority die to either its AC or a save the next time it is targeted by an attack or spell. Source: Ensider 22.

Distracting Strike

When you hit a creature with a weapon attack, you can expend one superiority die to distract the creature, giving your allies an opening. You add the superiority die to the attack's damage roll. The next attack roll against the target by an attacker other than you has advantage if the attack is made before the start of your next turn.

Double Time

When you move, you can expend one superiority die. Until the end of your turn, you can move an additional distance equal to the result times 5 feet. You still cannot move more than twice your speed on your turn. Source: Ensider 22.

Evasive Footwork

When you move, you can expend one superiority die, rolling the die and adding the number rolled to your AC until you stop moving.

Feinting Attack

You can expend one superiority die and use a bonus action on your turn to feint, choosing one creature within 5 feet of you as your target. You have advantage on your next attack roll against that creature before the end of your turn. If that attack hits, add the superiority die to the attack's damage roll.

Glancing Blow

Source: En5ider 48.

When you miss an enemy with an attack, you may spend a superiority die and inflict weapon damage to that opponent equal to the roll of the superiority die.

Goading Attack

When you hit a creature with a weapon attack, you can expend one superiority die to attempt to goad the target into attacking you. You add the superiority die to the attack's damage roll, and the target must make a Wisdom saving throw. On a failed save, the target has disadvantage on all attack rolls against targets other than you until the end of your next turn.

Grappling Strike

Immediately after you hit a creature with a melee attack on your turn, you can expend one superiority die and then try to grapple the target as a bonus action (see the Player's Handbook for rules on grappling). Add the superiority die to your Strength (Athletics) check.

Hamstring Attack

Source: En5ider 48.

When you deal slashing damage to a creature, you may expend a superiority die to slow its movement. You add the superiority die to the attack’s damage roll and the target must make a Constitution saving throw. On a failure, the target’s speed is reduced to 10 feet until the end of your next turn.

Inner Calm

When you fail a saving throw to end an ongoing effect, you can expend one superiority die to add the result to your roll. Source: Ensider 22.

Living Shield

When an adjacent friendly creature you can see takes damage, you can expend one superiority die as a reaction. The damage the friendly creature takes is reduced by twice the superiority die result, and you take half that damage. Source: Ensider 22.

Lunging Attack

When you make a melee weapon attack on your turn, you can expend one superiority die to increase your reach for that attack by 5 feet. If you hit, you add the superiority die to the attack's damage roll.

Maneuvering Attack

When you hit a creature with a weapon attack, you can expend one superiority die to maneuver one of your comrades into a more advantageous position. You add the superiority die to the attack's damage roll, and you choose a friendly creature who can see or hear you. That creature can use its reaction to move up to half its speed without provoking opportunity attacks from the target of your attack.

Menacing Attack

When you hit a creature with a weapon attack, you can expend one superiority die to attempt to frighten the target. You add the superiority die to the attack's damage roll, and the target must make a Wisdom saving throw. On a failed save, it is frightened of you until the end of your next turn.

Parry

When another creature damages you with a melee attack, you can use your reaction and expend one superiority die to reduce the damage by the number you roll on your superiority die + your Dexterity modifier.

Perimeter Scan

You can expend a superiority die as a bonus action to make a Perception roll, adding the superiority die to the result. Until the start of your next turn, can also add the superiority die to the next damage roll you make against a creature you detect in this way. Source: Ensider 22.

Pinning Shot

When you hit or miss a creature with a ranged weapon attack, you expend one superiority die to pin the target, who it must make a Strength saving throw. On a failed save, a flying target moves downward a distance equal to its speed while a target on the ground target is immobilized until the end of your next turn. Source: Ensider 22.

Precision Attack

When you make a weapon attack roll against a creature, you can expend one superiority die to add it to the roll. You can use this maneuver before or after making the attack roll, but before any effects of the attack are applied.

Pushing Attack

When you hit a creature with a weapon attack, you can expend one superiority die to attempt to drive the target back. You add the superiority die to the attack's damage roll, and if the target is Large or smaller, it must make a Strength saving throw. On a failed save, you push the target up to 15 feet away from you.

Quick Toss

As a bonus action, you can expend one superiority die and make a ranged attack with a weapon that has the thrown property. You can draw the weapon as part of making this attack. If you hit, add the superiority die to the weapon's damage roll.

Rally

On your turn, you can use a bonus action and expend one superiority die to bolster the resolve of one of your companions. When you do so, choose a friendly creature who can see or hear you. That creature gains temporary hit points equal to the superiority die roll + your Charisma modifier.

Riposte

When a creature misses you with a melee attack, you can use your reaction and expend one superiority die to make a melee weapon attack against the creature. If you hit, you add the superiority die to the attack's damage roll.

Sweeping Attack

When you hit a creature with a melee weapon attack, you can expend one superiority die to attempt to damage another creature with the same attack. Choose another creature within 5 feet of the original target and within your reach. If the original attack roll would hit the second creature, it takes damage equal to the number you roll on your superiority die. The damage is of the same type dealt by the original attack.

Tactical Assessment

When you make an Intelligence (Investigation), an Intelligence (History), or a Wisdom (Insight) check, you can expend one superiority die and add the superiority die to the ability check.

Trip Attack

When you hit a creature with a weapon attack, you can expend one superiority die to attempt to knock the target down. You add the superiority die to the attack's damage roll, and if the target is Large or smaller, it must make a Strength saving throw. On a failed save, you knock the target prone.

Watchful Gaze

When you or a friendly creature that can see and hear you roll for initiative, you can expend one superiority die to add the result to one such creature’s initiative roll. You may do so after you see the roll result, but before turn order is determined. You may expend multiple superiority dice in this way, but only one per character. Source: Ensider 22.

Watchful Strike

When you ready an action to attack and have made the attack you readied, you can expend a superiority die to make another attack the enxt time the conditions of your readied attack occurs. You add the superiority die to the attack’s damage roll. Source: Ensider 22, heavily modified.

Editor's Notes

There actually are no edits here, this is just copied for completeness.