Tooth of Shai-Hulud.

His name is Shai-Hulud.

Shai-Hulud decides today if you become Fremen, or if you die.

It's made from a tooth of Shai-Hulud, the great sand worm.

Little else is known of the Fremen,

There was a brave crossing they made in the path of Shai-Hulud.

To the Fremen.

Only the native tribes known as the Fremen have adapted well enough to survive.

Formerly known as Reek, now known as...

Hidden away within the rocks of these deserts are a people known as the Fremen,

With the Fremen.

And the Fremen?

Known to the Greeks as...?

Known to all as...

known to his enemies as...

Known to my enemies as...