If you mean the Hanzamune Dragon Koi Blade, then it is dropped from Kitsune in the location Kitsune (/join kitsune).
there is no such sword
oicu812
in sword haven
i buy it
buy it
You can't get it anymore
punch your balls
kill grumble in the sewer
Only beta can not get now
for a cool darkness sword ociu812
You get it at the the suggestion shop in yulgar.
The code is oicu812.