It was a dragon with seven heads who lived near Oltre il Colle (in the province of Bergamo), devouring livestock and drinking of water that would provide immortality, was attacked by farmers and hunters, in vain, then he was attacked by an army composed of the best soldiers of the armies of the small states of Italy and fled, defeated, in the water, which became muddy and undrinkable water of Oltre il Colle.
It is not the only monster in the area of Oltre il Colle: there is also a wicked maga (sorceress in Italian) to threaten it.
It was an enormous animal similar to a wolf. It ate pets and childten and terrorized Milan during 1790s and the milanese organized a hunt against it. After months they killed the Ferocious Beast and put its body at the University of Pavia. Today it is not there, someone says it is relived, someone it was taken by Austrian or Nazis during Italian occupation, no one know where is it.
Refers to a brilliant idea or discovery that seems simple or easy after the fact. The expression refers to a popular story of how Christopher Columbus, having been told that discovering the Americas was no great accomplishment, challenged his critics to make an egg stand on its tip.