5 September 2017 11:26 PM (dream)
The Hydra were huge aliens, like muscular bridges. Very long lived, they were filter-feeders. They would find waterfalls and attach themselves to them like living aqueducts and filter small animals, plants, and decaying organic matter from the water.
They had some enmity with humanity and they were creating humanoid versions of themselves to try and infiltrate, fight against, and act as ambassadors to humanity.
There was also some more eldritch force, quite merry and malevolent, a cheerful sadist. Seemingly invulnerable. It kept popping up around me. I found a box of something, images of the room I was in that could be stretched out and laid over it. Each was from a different perspective, and every time I used one the malevolent force would transfer from the room to the picture of the room and be trapped within it for 180 seconds.
I had got the idea that if I could thoroughly destroy the room by self-destructing the ship I was on while the entity was in the picture it wouldn't be able to find its way back into the normal universe, at least not for a long time, though I was hesitant to actually blow up an entire ship, even assuming I actually could which I was by no means certain of, since there was a whole lot of security in the way.