Twelthborn - Fire Tails

An amalgamation of features makes up the Twelfthborn. They have horns which are either sharp or curled but are generally the same color as their hair. Their skin can go from tones seen in the more common colors to a variety of reds, blues, and purples. Their hair can go from a blonde all the way to a black, then to dark blues, to dark reds. Their most well known feature and where their nickname is derives, is their tail which a flame rests upon the tip, which is always either a red, blue, or purple. This flame seemingly only ignites something when the Twelfthborn wills it, as the temperature emitted seems to peak drastically until they will it to stop, though it does drain them. Twelthborn also possess some of the sharper teeth of the Borns. Pureblood

+1 Dexterity +1 Charisma
Inner Flame: A pureblood may summon surprising strength from within themselves during time of need. They may choose a fire based spell equal or below their proficiency modifier. This spell can be changed once per long rest and can be used (Proficiency Modifier/2) times before needing a short rest.
Flame Ever Flickering: Due to the strong ability of purebloods to maintain their flame, Firetails reduce water and cold based damage by their (Constitution Modifier or Charisma Modifier + Proficiency Modifier) They also add their proficiency modifier on top of all other modifiers when rolling a save DC against a cold or water based effect. The tail may illuminate light sixty feet around the twelthborn. It may also be used as a weapon and deals (Proficiency Modifier)d4 + (Dexterity modifier or Charisma Modifier) in fire damage.

Halfblood

+1 Charisma
Rolling Fire: A halfbloods flame is far less stable within themselves, this flame fights to find freedom from their tail, excited exceptionally when the halfblood wills it or when they are attacked. This manifests in the form of flame charges, which a halfblood holds (Charisma Modifier or Constitution Modifier x Proficiency Modifier) charges. Whenever an attacker successfully hits a halfblood within (Charisma Modifier or Constitution Modifier) x ten feet, the halfblood at a cost of one charge can allow their flames to lash out as a bolt of fire as a magical attack they are proficient in and using (Charisma Modifier or Dexterity Modifier) as the casting attribute. This attack simply costs the charge it is not considered a reaction. This bolt deals (Proficiency Modifier/2)d8 + (Charisma Modifier or Dexterity Modifier). At the expense of all remaining charges (must at least be two charges) a half blood may let out a rolling firestorm that has a radius of (Charges Expended/2) times five feet. All within this torrent of flame must make a dexterity saving throw against a DC of (Charges Expended + Charisma or Constitution Modifier + Proficiency Modifier), if they fail they take (Charges Expended)d6 + (Charisma Modifier or Constitution Modifier) if they succeed they take half damage.