The curse grant one elemental immunity associated with your Dragon Chromatic Ancestry that cursed it.
Draconic Wrath: Your dominant arm starts becoming covered in dragon scales (associated with your Chromatic Ancestry) starting at the hand, on an attack action a player can slash with their dragon claw.
When you take the Attack action on your turn, you can replace one of your attacks with your dragon claw. Magical slashing damage is dealt to any creature in a 50ft line, and slicing anything else in half, following the path of their slash. Each creature in that line must make a Dexterity saving throw (DC = 8 + your Constitution modifier + your proficiency bonus). On a failed save, the creature takes Characters Level d10 damage of the type associated with your Chromatic Ancestry. On a successful save, it takes half as much damage.
This ability can only be used once per day.
Doing this will reduce your current health by 50% (the player will fall unconscious when used at 1hp) this will also spread the dragon scales 2in(5cm) up the user’s arm. When the curse reaches the elbow, health reduction is dropped to 25%. At the shoulder no health is lost, and the curse either stops, or spreads to the player’s second arm.
Draconian Wisdom: The cursed player’s eyes change color (associated with your Chromatic Ancestry) on a bonus action, the player can add 20 to all wisdom-based checks for any given time, but after it ends their wisdom checks are reduced by 20 for that same time.
Draconic Avarice: The cursed gains colored magical essence light along their jugular veins (associated with your Chromatic Ancestry), this power can be activated at any time ignoring turns to automatically succeed on any check, but automatically failing the next check.
At 10th level you can succeed two checks before failing one. At 15th level you can succeed three checks before failing one. At 20th level you can succeed four checks before failing one.