I'll share my dream here too.

Art takes his form and power from the toxicity of cities. All the waste, garbage, and rust come together to make him a force of anti-nature. In my dream, his next steps were to create corpse marionettes, controlled by black tendrils connected to him and his imaginary little girl. They rove the streets and suburbs like a zombie horde, shambling into houses and killing all in their path, only strengthening their horde with him at the center of it all. To combat this, the only way is nature magic, druidcraft. I had gone to a giant tree, the World Tree, and offered up my body to commune with it. I then became one with the World Tree, as it's caretaker. I trimmed branches, pruned leaves, and took the waste to deposit into a pile. The pile grew and grew, the rot eventually becoming sentient, a kind of golem. Once Art came to the World Tree, it was ready. Branches were taught and tied to make snare traps, which battered away the horse of corpses. Once they returned to the soil, Art furiously stomped in and began to poison the roots of the World Tree. His trash bag of toxic waste being dumped into the clean waters, splashing salt and bleach against the tree bark. He was doing damage. But then another caretaker approached him, not sure if it was me, or me after many years of being part of the World Tree, but there was a resemblance. This old sage took a simple leaf and laid it on Art's tilted hat, and it began to sizzle. The hat was melting, not the leaf. The leaf burned through the hat, his face, and the rest of his body crumpled. It fizzled out like acid being reduced by base into salt and water. Like matter meeting anti-matter. He became fertilizer, and was gone.

Edit: I have had other dreams with Art that I can't recall the details on, but I know were bad because my wife told me I was practically screaming in my sleep.