Ebra Ukgestuzang, Forgotten Beast has come!
A gigantic six-legged quadruped composed of mud. It has a bloated body. Beware its webs!
Ebra has been hanging around under my fortress for several years now. I've blocked off the caverns for the time being, not wanting monsters to get into my fortress from underneath. I've rigged up a drawbridge mechanism to let me periodically drop a few kittens down there to act as scouts and explorers.
Ebra loves to attack kittens. Ebra always gets the worse of these encounters. The fights consist of Ebra rushing over to a kitten and kicking at it, every attack glancing away harmlessly. Sometimes the kitten is knocked over, still without any injury that I can determine. The kittens fight back, of course, tearing fragments of tissue (which seems to consist of mud) out of the forgotten beast, leaving yellow wounds on its body. Ebra doesn't feel pain and has no blood, so this doesn't seem to bother it much. The fights go on until the kitten gets annoyed enough to run away and escape from their utterly incompetent opponent.
That's right, I have a forgotten beast who is physically incapable of harming a kitten. I have rigged up an elaborate magma-based deathtrap for killing otherwise unkillable titans and forgotten beasts, but I don't see the point in using it against Ebra. Maybe I'll try and capture him for use as a practice dummy for my soldiers or something. Pity it doesn't actually throw webs that I could tell, or I would use it to set up a forgotten beast silk farm.