Gorrok chooses Sentinel. When he hits a creature with an opportunity attack, the creature's speed becomes 0 for the rest of the turn. Creatures provoke opportunity attacks from him even if they take the Disengage action, and he can make an opportunity attack when a creature within his reach attacks a target other than him.

Gorrok can use an action to study another creature within 30 feet for at least one minute. He learns whether the creature is his equal, superior, or inferior regarding Strength score, Dexterity score, Constitution score, armor class, current hit points, total class levels if any, and fighter class levels if any.

Gorrok can expend one superiority die and use a bonus action to direct one ally who can see or hear him to make one weapon attack using its reaction. The ally adds the superiority die to the attack's damage roll.

Gorrok can use a bonus action to regain hit points equal to 1d10 + 18.

Gorrok can use a bonus action to move up to his speed toward a hostile creature he can see or hear. He must end this move closer to the enemy than he started.

Gorrok can use a bonus action to enter a rage-like battle focus for one minute. Once used, he cannot use this feature again until he finishes a long rest. While active, he has advantage on Strength checks and Strength saving throws, and his melee weapon attacks deal extra damage equal to 4.

Gorrok chooses Great Weapon Master. When he scores a critical hit or reduces a creature to 0 hit points with a melee weapon, he can make one melee weapon attack as a bonus action. Before making a melee attack with a heavy weapon, he can take a -5 penalty to the attack roll to gain +10 damage if the attack hits.

When Gorrok uses Action Surge, he can make one weapon attack as part of the same bonus action used to activate Great Weapon Master if he scores a critical hit or reduces a creature to 0 hit points during the action.

When Gorrok hits with a weapon attack, he can expend one superiority die to deal the die's result as extra damage and force the target to make a Strength saving throw. On a failure, the target is knocked prone.

When Gorrok hits with a weapon attack, he can expend one superiority die to deal extra damage and force the target to make a Wisdom saving throw. On a failure, the target is frightened of him until the end of his next turn.

Gorrok can take one additional action on his turn.

Gorrok can reroll a failed saving throw and must use the new result.

Gorrok has a fighting style focused on Great Weapon Fighting. When he rolls a 1 or 2 on a damage die for an attack made with a melee weapon wielded with two hands, he can reroll the die and must use the new roll.

Gorrok can attack twice, instead of once, whenever he takes the Attack action on his turn.

Gorrok gains proficiency with a gaming set of his choice and with land vehicles. He also gains proficiency in one additional language, Goblin.

Gorrok has advantage on saving throws against being frightened.

When Gorrok scores a critical hit with a melee weapon attack, he can roll one additional weapon damage die and add it to the extra damage of the critical hit.

Gorrok chooses three Battle Master maneuvers: Commander's Strike, Menacing Attack, and Trip Attack. He has four superiority dice, which are d10s. He regains all expended superiority dice when he finishes a short or long rest. His maneuver save DC is 19.

Gorrok gains proficiency with smith's tools.

Gorrok increases his Strength score by 2, to 20.

Gorrok increases his Constitution score by 2, to 18.

Gorrok increases his Dexterity score by 2, to 18.

Gorrok increases his Wisdom score by 2, to 16.

Gorrok gains a fourth attack whenever he takes the Attack action on his turn.

Gorrok can find the military forces of the encampment, fortress, or settlement nearest to him, and he can request shelter, food, and basic assistance from soldiers who recognize his former rank or reputation. He can usually secure aid from other soldiers, though they do not risk their lives for him.