Dragonborn Subrace

[Keraki]

Prismatic Dragonborn:
All the normal traits that all dragonborns get with these subrace variants

Prismatic Breath:
You can use your action to exhale destructive energy. Your draconic ancestry makes your breath weapon a prismatic spray.
To determine damage type roll a d6 and compare it to the following table

[d6] [Color] [Damage Type]
[1] [Red] [Fire damage]
[2] [Orange] [Acid]
[3] [Yellow] [Lightning]
[4] [Green] [Posion]
[5] [Blue] [Cold]
[6] [Special] [Roll twice more, rerolling any 6]

When you use your breath weapon, each creature in the area of the exhalation must make a dexterity saving throw. The DC for this saving throw equals 8 + your
Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage
increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level.
After you use your breath weapon, you can't use it again until you complete a short or long rest.


Prismatic Resistance:
You have damage resitance of the same type as your last breath attack.

or

Damage resistance to light spells and immune to blindness.



Any thoughts on this?