Weird dream. What could it mean?

Last night I had a dream. I can’t remember most if it. I remember a voice, kind of deep, but not scary and menacing, yelling, “DIRT. DIRT. DIRT.” At the same time, I saw an image of deep grey dirt. What could it mean and/or who could’ve sent me signs of dirt?

Side note: I’m still working with Duke Dantalion, so could it have been him, and what does he want with dirt?