Complex sentence: Nobody knows almost any physical or mental features of the gentle zits, since they were totally eradicated from the reality by the "machine that could create anything starting with n" when a constructor called Klapaucius ordered it to make nothing.
Split into simpler sentences: Nobody knows almost any physical or mental features of the gentle zits, since they were totally destroyed by the "machine that could create anything starting with n". The machine that could create anything starting with n completely erased zits from the reality when a constructor called Klapaucius ordered it to make nothing.