Hidden Blade( Complete Scoundrel, p. 87)
[Manipulation, Skill Trick]
You can quickly draw a hidden weapon to make a deadly strike.
After you have used the Sleight of Hand skill to successfully conceal a weapon (PH 81), you can draw that weapon as a move action instead of a standard action. An opponent that was unaware of the concealed weapon is treated as flat-footed against the first attack you make in that turn.