Slythe has a ring of Blur equipped though it cannot be looted from his body. The ring causes all attacks against him to suffer a -3 penalty and gives him +1 to saving throws. Slythe also has a Ring of Free Action which prevents him from being entangled or having his movement hampered in any way. This ring cannot be looted either.
I have received your letter and am quite overjoyed by your proposition. I have told my wife, and she is as excited as I am. I accept your mission and think that your payment is very adequate. This will be our greatest feat yet! To kill three Grand Dukes of Baldur's Gate! We will be arriving in Baldur's Gate within a week, and should be taking up our usual residence at the Undercellar. If you wish to contact us, you will find us there. Use the access points through the sewers.
I must say that our first victim was not the challenge that my wife and I had expected. The foppish idiot had only the most token of defense. However, I can assure you that Entar screamed quite deliciously all the way to the end. I hope that this next mission is much more difficult; from what you have told me it would seem to be. Assassinating two Grand Dukes in their own palace, while they harangue the high nobles of Baldur's Gate no less! I can't wait! You still know where to find us. You should come down and enjoy the pleasures of the Undercellar for yourself; but if I know you, that'll never happen.