What's its purpose?

As the art kid i shall explain, this majestic Creature is the white pencil, it is used to blend colors and get rid of the white spots. Incredibly important tool all the traditional artists use

Ah yes, the white crayon removes the white spots! 💀

You can also use it for highlighting specific details.

Ah yes!

YES.

There was only 1 time I NEEDED this, we had to make a moon on a black paper in school in 1st grade

its purpose is to draw clouds on that one diy craft project that uses the thing in the middle of toilet rolls which is brown

Its purpose is to get companies who make school supplies more money.

If you have black paper you can do some interesting shading with one of those mfs

Prismacolor is expensive as sh tho

it can be used to cover up pencil markings that can't be erased

It's used in detective shows to write invisible messages.