The Survivor fighter subclass epitomizes the indomitable spirit and adaptability of humans in the face of a zombie apocalypse. Through harrowing experiences and constant battles for survival, these fighters have honed their bodies and minds to thrive amidst the chaos of the undead onslaught.

Resourceful Fighter

 Starting at 7th level, your survival instincts and adaptability in combat enhance your effectiveness against the undead:

1. Survivor's Reflexes: You gain proficiency in Dexterity saving throws if you don't already have it. If you already have proficiency, you gain expertise in Dexterity saving throws instead.

2. Resilient Fighter: You have advantage on Wisdom saving throws against being frightened

Indomitable Human Spirit

At 3rd level, your constant struggle for survival has honed your body's ability to react swiftly in dangerous situations. You gain the following benefits:

Adrenaline Rush: You can enter an adrenaline-fueled state. While in this state, you ignore any current levels of exhaustion your character might have, you gain 10 ft to movement speed, Avantage on Dexterity (Acrobatics) checks and Advantage on Strength (Athletics) checks. Your weapon attacks deal additional damage equal to your proficiency bonus and Attacks of opportunity on you are at disadvantage. This state lasts for 3 minutes or until you are incapacitated. After the 3 minutes, your movement speed is halved and attacks made against you are at advantage until the start of your next turn; you also gain a level of exhaustion. Once you use this feature, you can't use it again until you finish a short or long rest.

The Zone: Whenever you roll a natural 20, you briefly enter a state of total focus and precision. For 1 minute you have advantage on Constitution Saving Throw, advantage on Wisdom (Perception) checks, and every attack that you successfully hit will be rolled at max damage. 

 

Master Survivor

At 10th level, your experience in the zombie apocalypse has elevated you to a master of survival and combat:

Quick Reflexes: You can take the Dash or Disengage action as a bonus action on your turn.

Resilient Fighter: You have advantage on Wisdom saving throws against being frightened

Last Stand

Starting at 15th level, you've faced death so many times that you can shrug off grievous wounds and continue fighting:

 

• Survivor's Grit: When you are reduced to 0 hit points but not killed outright, you can use your reaction to make a Constitution saving throw with a DC equal to 10 or half the damage taken, whichever is higher. On a success, you drop to 1 hit point instead. You can't use this feature again until you finish a long rest.

• Inspiring Presence: When you use your Second Wind feature, you can choose up to three other creatures within 30 feet of you that are allied with you. Each chosen creature gains temporary hit points equal to your fighter level + your Constitution modifier (minimum of 1 temporary hit point).

 

Unyielding Survivor

At 18th level, your will to survive and your combat prowess make you a force to be reckoned with:

• Undead Bane: Your attacks against undead creatures score a critical hit on a roll of 18-20 on the d20. Additionally, when you score a critical hit against an undead creature, you can roll one additional weapon damage die.

• Relentless Assault: Once per turn, when you hit an undead creature with a weapon attack, you can choose to push the creature 10 feet away from you. If the creature is Large or smaller, it must make a Strength saving throw against a DC equal to 8 + your proficiency bonus + your Strength or Dexterity modifier (your choice) or be knocked prone.