The Sword of Assassination was originally written by Bruce E. Wright, but here merely provides inspiration for my write up here, since his version relies heavily on the AD&D assassination rules. Hopefully I roll well on my 2d20.
When in disguise, the true appearance of the ruby sword can be concealed as any other normal weapon, as small as a dagger or as large as a pike or lance. No matter what weapon it appears as, you have proficiency in it.
You can use your Assassinate ability against any creature in the first round of combat, even if the target has already acted in that round.
When you use your Death Strike ability, the strike does triple damage on a failed save.