Tale of a Dreamwalker DW

There are times when dreams become something tangible, a world that is real... and yet not.
There are times when something might invade these worlds, seeking to leech off of the thoughts fuelling the so-called dreams.
There are times when such worlds become twisted, dangerous...
By then, it is far too late.
We call those exploring such dreams "Dreamwalkers" - always accompanied by their trusted "Tethers" keeping their consciousness anchored to reality.
Not many know of the silent defenders of humanity.
But those who know praise their existance.