Complex sentence: A mud-man is a creature of animated mud, taking a stocky humanoid form when roused, and is formed in a pool of mud where enchanted waters collect and evaporate and concentrate the dweomer.
Split into simpler sentences: A mud-man is a mud monster that is composed of animated mud, taking a stocky humanoid form when roused. The mud-man is formed in a pool of mud where enchanted waters collect and evaporate and concentrate the dweomer.