Roguish Archetype: Draco-Touched

Rogues of this archetype have some sort of connection to dragons--whether it be from their bloodline, a pact, or some other method; these rogues have learned to manifest the powers of both metallic and chromatic dragons--and eventually, gem dragons.

Draconic Strikes

At 3rd level, when you deal your sneak attack damage, you can change the damage type of your sneak attack damage to fire, cold, lightning, acid, or poison. When you use this feature, the target takes extra damage ewual to your proficiency bonus. The damage type is the same as the type chosen for your sneak attack damage.

Imposing Presence

When you choose this archetype at 3rd level, you gain proficiency in the Persuasion or Intimidation skill if you don’t already have it. Your proficiency bonus is doubled for any ability check you make that uses the chosen proficiency.

Improved Draconic Strikes

At 9th level, you can choose one of the following damage types: force, thunder, psychic, necrotic, or radiant. You can add the chosen damage type to the available choices for your Draconic Strikes feature. You can change the chosen type whenever you gaina  level in this feature. Additionally, when you use your Draconic Strikes feature, you can force the target of that attack to make a Wisdom saving throw or become frightened until the end of your next turn.

The DC for this ability is 8 + your Dexterity modifier + your proficiency bonus.

Draconic Manifestation

At 13th level, you gain a flying speed equal to your walking speed as your connection to a draconic being manifests in the form of spectral draconic wings.

Dragon's Breath

At 17th level, as an action, you can release a cone of elemental enrergy in a 30-foot cone. Each creature in the area must make a Dexterity saving throw or take damage equal to your 2d6 + your sneak attack damage. You can choose the damage type dealt by this feature each time you use it, among the choices available for your Improved Draconic Strikes feature.

The DC of this ability is equal to 8 + your Dexterity modifier + your proficiency bonus. You can use this ability an amount of times equal to your proficiency bonus per long rest.