Deeply unpleasant. A predator from the People of The Dream include any people who live between dimensions and....
These creatures prey on the Dreams that come to sleeping humans. If you’ve ever woken feeling like you didn’t sleep worth beans, it was likely because a dream-leech kept any hungry Dreams from reaching you.
When the Dream “feed” off humans, humans themselves enter REM state; the humans are healthier, and the Dreams are fed. Dream-leeches get in the way of all that, and their presence (combined with the growing rarity of Dreams themselves) are responsible for more weariness in this world than any other cause.
Symptoms include inability to recall one’s dreams, only a growing sense of unease upon waking, tied with exhaustion in spite of much rest.