Traits

Can be any length, any color, ect

MUST be visibly water

Limited to these species: Gemstone ponies, crystal kirins, and mergems

Can be any natural light color

Made of light, it can't do magic

Can be any type of horn (myo, curved, kirin, ect)

Limited to these species: Gemstone ponies, crystal kirins, and mergems

Always glow

No pupils or iris

Only white

No species limitations

Can be any size and shape

Must be made of sand, no unnatural colors

Located on the rump only

Limited to these species: Gemstone ponies

Can be any color, any length, must be visibly water

Please note:

-Water horns cannot be paired with water wings and cannot do magic

-Water wings cannot be paired with water horns and cannot fly

No species limitations