Love when I get into what-if-I-did-this mode.
Here's what I had going in:
What if I did this—created a line of black fabric paint and scraped it with a matte knife?
What if I dripped some Golden transparent high flow acrylic phthalo green blue shade (new-to-me product) and spritzed it with water?
What if I defined some areas using oil pastels?
What if I painted white over the space outside the defined areas?
What if I developed the defined spaces with some linework?
What if I stopped for the day to give this piece some breathing room?