The Rabbie Phantasm Dungeon is the newest dungeon to hit Mabinogi, but it's not for the faint of heart. The most difficult dungeon to grace Mabinogi yet, you'll need the help of good allies, and plenty of skill, in order to survive.
So the sword is "Soluna". That's not a bad name.
Also I'm probably going to run in, gasp at all the decorations, and die.