Base Class: Fighter
Dragon knights are fighters who specialize in bringing down the mightiest monsters with a few, resounding blows. They are warriors who have bathed in the blood of the battlefield and have greatly increased their physical capabilities. (Credits to @CaptainMee89, Art by dleoblack)
Hunter's Talent
Starting at 3rd level when you take this Archetype you gain proficiency in one of the following skills; Investigation, Perception, Stealth, or Survival. Additionally whenever you make a Intelligence (Investigation), or Wisdom (Survival) check to track dragons your proficiency bonus is doubled if it applies to the check
Find the Gap
Starting at 3rd level you become skilled at finding the weak spot in an opponent's defenses. You may use your action to make a melee weapon attack adding 1d4 to the d20 roll of the attack. If applying this bonus increases the total to 20 or higher (before adding any other modifiers), you gain the benefits of rolling a 20 on the d20, and the attack deals an additional 1d10 damage. This damage increases as you gain levels in this class; 2d10 at 6th, 3d10 at 11th, 4d10 at 16th and 5d10 at 20th.
Evasive Tactics
Starting at 7th level your experience combating horrifying monsters has taught you how to best use the environment to your advantage. You can use your bonus action to take the dash action. Additionally the bonus to your AC and Dexterity saves granted from cover is increased by 1.
Evasion
At 10th level, your instinctive agility lets you dodge out of the way of certain area effects, such as a blue dragon’s lightning breath or a fireball spell. When you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you instead take no damage if you succeed on the saving throw, and only half damage if you fail.
Unyielding Will
Starting at 15th level you gain immunity to the frightened condition.
Crippling Strike
Starting at 18th level your attacks hinder your opponent's mobility. If you score a critical hit against a creature with a weapon attack that creature's movement speed is reduced to 0 until the start of your next turn.
