Lauda The Lead Horned Unicorn’s Story. The metal-horned unicorns are a rare and special breed. They are born with a metal horn and their magical abilities are linked to the type of metal they possess. Lauda’s horn is made of lead, which is why she is able to melt metal with it. This ability has come in handy on many occasions, such as when a metal object is stuck or when a piece of machinery needs repairing. Read more.