“Imperial gold?” Percy asked.
Reyna unsheathed her dagger. Sure enough, the blade was gold. “The metal was consecrated in ancient times, at the Pantheon in Rome. Its existence was a closely guarded secret of the emperors—a way for their champions to slay monsters that threatened the empire. We used to have more weapons like this, but now…well, we scrape by. I use this dagger. Hazel has a spatha, a cavalry sword. Most legionnaires use a shorter sword called a gladius. But that weapon of yours is not Roman at all. It’s another sign you’re not a typical demigod. And your arm...”

The Son of Neptune, Chapter III