Roguish Archetype - Dragon Fist

A rogue of this archetype has acquired a fist unrivaled under heaven, the Dragon Fist. Passed down from a single teacher to a single student and considered heresy by any monastery, the Dragon Fist is an assassination art kept hidden from the world. Without the use of ki, you can crush and destroy vital organs with a single strike, resulting in immediate demise.Whether you're good or evil, a dragon dwells in your hand. Wielder of the Dragon Fist, for what reason do you fight?

Dragon Fist

When you choose this archetype at 3rd level, you've inherited an assassination art, the Dragon Fist. You can use Dexterity instead of Strength for the attack and damage rolls of your unarmed strikes, your unarmed strike uses a d6 for damage, and your unarmed strike can benefit from your Sneak Attack. When you make an attack roll with an unarmed strike and miss, you can use your bonus action to reroll the attack roll, and you must use the new roll. You also gain an additional way to use your Sneak Attack. You don't need advantage on the attack roll to use your Sneak Attack against a creature if you don't have disadvantage on the attack roll and you use either of the following features.

Dragon Claw. If you move at least 15 feet straight toward a creature and then hit it with an unarmed strike on the same turn, you can use your Sneak Attack against that creature.

 

Dragon Fang. If you haven't moved on your turn and your speed isn't 0, when you hit a creature with an unarmed strike you can use your Sneak Attack against it, even if you do not have an ally within 5 feet of the creature. Until the start of your next turn after you use this feature, your speed is reduced to 0..

Dragon Eye

Starting at 3rd level, you see through and avoid danger. While you are wearing no armor and not wielding a shield, your AC equals 10 + your Dexterity modifier + your Wisdom modifier. Additionally, you see through whoever you fight. When a creature attacks you, you have advantage on any Wisdom (Insight) and (Perception) checks against it for 1 minute.

One Strike

Starting at 9th level, you begin to look from above martial artist, single strike is enough. You gain a number of Focus charges equal to your Proficiency Bonus. Once per turn, whenever you use your Dragon Claw or your Dragon Fang against a creature, you can spend a Focus charge to increase your Sneak Attack damage against that creature by 2d6. Whenever you reduce a creature to zero hitpoints, you regain two Focus. Otherwise, your current Focus resets to half your maximum upon completing a long rest.

Additionally, your unarmed strikes ignore resistance and immunity to their damage type.

Dragon Step

At 13th level, your approach can't be ceased. While you're on the ground and you aren't prone, you can't be knocked prone unless you allow it. Additionally, as a reaction when a hostile creature misses you with an attack, you can move up to half your speed towards or directly away from it, without provoking opportunity attacks.

Only One Strike

Starting at 17th level, you have mastered the Dragon Fist, a second strike is needless. When you hit a creature with your Dragon Fist feature, you can attempt to end it instantly. You immediately spend all your Focus, and the creature takes additional d6 of damage equal to twice the focus spent.

You can only harm a specific creature this way once, and must meditate on your failings over the course of a long rest to do so again