Goblins exist in the parallel plane as humans. They only see us as wisps of smoke if they smell us. A physicist stumbled on their existence when he'd sought his coworkers to help verify his work. As the global team of researchers looked into the math calculations, they disappeared, one by one.
A colleague working in the same lab had taken a look at his research out of curiosity during lunch. The physicist returning to the lab made a horrifying discovery, as he witnessed his friend being pulled into nothingness, disappearing as nothing more than wisps of smoke.
The goblins live in a dimension with nothing but whiteness. Under the right conditions, the goblins were able to sense humans, and would try and grab at the strands of smoke. If caught, the human would be pulled into their dimension, and eaten.
The researcher hid nearby, as the hand mirror his colleague dropped fell into pieces. He noticed movement in the reflection of one shard and concentrated hard on it. It had green skin and grotesque teeth. And it was attacking his friend who was now also in the same scene.
Hello vivid #dreams, my old friend.