Source: Pathfinder Bestiary, pg(s). 229
The pseudodragon population which makes its home in the along the rooftops of Korvosa is in constant conflict with the large number of imps brought to the city by the summoners of the Academae. Many of Korvosa's nobles decorate their roofs with tiny amounts of precious metals, among them silver-lined weather vanes, shingles, and gutters designed to catch the sunlight to give their homes a distinctive sparkle in the sunlight. By spending years sharpening stings and teeth against these silver-enhanced decorations, or sneaking drinks of holy water from outdoor fonts at various temples, some pseudodragons have effectively transformed themselves into deadly weapons against the city's imps.