I'm new here, but I hope I'm doing the right thing by posting here, Mr.Corriero.
The Polymefus is a docile yet dangerous beast. It's sheer presence rattles the earth when it moves warning all the creatures to make way for it. It moves extremely slowly & goes into hibernation for 9 out of 12 months. Unlike other creatures it actually feeds on the oxygen in the air & nothing else. It is blind & usually only moves in a particular path. Although it does not cause harm on purpose, the gases it emits are extremely poisonous & as such forms a shield of gas around the creature. Due to the intense poison gas, creatures other than it's kind cannot sustain around it & die if they don't escape it in time.