The Japanese-themed blade is the ideal weapon for Samurai and Warrior class players. Because it is intelligence-based, the Moonveil Katana is an excellent choice if you don't want to spend all day grinding your strength stat.
The Moonveil Katana is also an excellent weapon to obtain in the early stages of the game. But don't try to find it too soon, because you'll run into a difficult boss that must be defeated before you can claim it. Here is a guide on how to get the cool blade.