The Dream Magic Experiment

I was in a mansion of sort, mostly made of wood. I don't know who owns it, but I think it was like a dormitory of sorts for our organization. I was trying to hold on to a powerful creature (reminds me of Visser Three, but in Pokemon form). I finally released it in a room, and I ran down a flight of stairs, and out of the place.

I jumped/passed through a river. I tried swimming, but then there was a huge eel. It shot its long, sticky tongue at me. I tried cutting it off. I continuously swam until I reached dry land/cement. There were two of them. I hurried to climb a tree and used my ability to blend with the tree colors.

I'm home in our store.