Born from the damming of a dam, my people are strong and hardy. Once holy servants to four kingdoms, their concurrent demise diminished our status. We are now a simple people, no longer worshiped by many. Though smaller than our desert cousins, we're almost the spitting image. We come bearing gifts. A chest sits before you, filled with food. Below it, drinks to quench your thirst. Upon the chest, sits cloud made flesh upon a sheet unreadied. It is fit for slather with the dripping of the mind.
We send them with our leader, a native of Mastbergen. Though he is half cucumber, you have accepted him and even included him in conversation. For this, we thank you.
Who are the people mentioned? Provide reasoning. Each sentence other than the thanks contains at least one clue. The title refers to the species name of the cucumber plant, not marijuana.
What do these people have in common with LL Cool J? Just a couple of things.