Airgetlám, the silver arm. The legend goes that Nuada was the first king of the Tuatha Dé Danann, early Celtic deities, but lost his arm in combat and was removed from the throne for imperfection. Years later, he returned with an arm of silver and took the throne back from the oppressive ruler who had replaced him, and he became known as Nuada Airgetlám.

[Or at least, that's the short version. While the Airgetlám of Maria's world is a little different and seems to blend with the legend of his sword as well, it's a useful background to have.]

Ah, yes, she invited me to that, but I thought I might be a bit old compared to the rest of the guests.