The Demolemming is a mythical creature that has been reported many times. It's rarity is due to it's suicidal nature.
The Demolemming is very aggressive and spends it's whole life attempting to kill anything it can find. It uses haphazard tactics that usually ends up killing the Demolemming instead of the victim itself.
The appearance of a Demolemming usually consists of either a strangely-coloured horn or a helmet cranium resembling a knight.