Today I am previewing my favorite monster write-up (so far) for my Samurai project using the S&W rules. I give you the wicked Jorogumo.
Armor Class: 7 
Hit Dice: 4
Attacks: 1 bite [1d6 + poison] or 2 web attacks [see below]
Special: Lethal poison, Webs
Saving Throw: 13
Challenge Level/XP: 7/600xp
Jorogumo are ancient spiders than can take the shape of a beautiful woman. They typically make their homes in deep pools or near waterfalls. They attempt to drag victims to their lair by entangling them in their webs. A Jorogumo can use its 2 web attacks (treat as ranged attack with range of 30 feet) to capture prey, those that are hit must make a saving throw to avoid becoming stuck. Once hit with webs, the Jorogumo will drag the victim 5 feet per round (the victim can make a saving throw each round to either break free from the webs or attempt to keep from being dragged). The web can be attacked as an object with an AC 9  and 4 hps. In the form of a woman the Jorogumo can cast Charm Person twice a day.