They did it as a warning. The three pale skulls placed on the ledge, seeming to have been there for so long but we knew they were recent. It’s how they worked. What you saw wasn’t always what was.
I had been coming here into this forest for some time searching for the ones who did the bizarre. Like leaving three skulls, always it was three pale skulls.
Why didn’t they want me or anyone else entering their domain?
There’s was a secret world where shadows contained substance and what you thought of as substance was so often a mirage or another shadow.
They did magic things in the forest. They concocted potions and promoted what they wanted and destroyed what they didn’t. It was a random thing or so I thought. In times of drought they cultivated the cactus, the plants most of us marveled at but never ones we really grew in any way to love. The forest people saw them as a source of salvation in hard dry times, the flowers of the cactus especially valuable as they contained the necessary nutrients to sustain life. As well as the leaves of the cactus providing water on long hot days.
They didn’t want their world disturbed by the ignorant, such as me.
We know the skulls meant something, when anyone ventured into the forest to explore it was often a matter of never seeing them again. The forest people took no prisoners, asked no questions, just left warnings, enter at your own risk.