Fighter

Martial Archetype: Warden

Immovable Wall

Beginning when you choose this archetype at 3rd level, as an action, you gain the ability to temporarily increase your AC by +3 during combat. This feature can be used a number of times equal to your fighter level per short or long rest.

Turn the Tide

Starting at 7th level, when you bring a foe down to 0 hit points, you and your allies (at or within 15ft.) gain a defensive barrier making you harder to hit. Your enemies suffer disadvantage on all attack rolls. This effect lasts a # of rounds equal to your Con. modifier. This feature can only be used once every short or long rest.

Rallying Force

Starting at 10th level, when you are brought below half your hit points, a pulse of restorative magic (15ft sphere) heals you and your allies for 1d10 (+1d10 at 12th, 14th, 16th, 18th, and 20th). This feature can only be used once per short or long rest.

Charge!

Starting at level 15 you gain a charge. As part of your movement you can charge an additional 20 feet in a straight line. Any non-friendly creature caught in the charge must make a strength saving throw. On a fail, they take 1d10+strength bonus bludgeoning damage and are knocked prone. On a success they take half damage.(The DC is equal to 8+proficiency bonus+strength bonus) This feature can only be used once per long rest.

Bastion

Starting at 18th level, all of your abilities that could only be used once per long rest can now be used twice per long rest.