Rogues cunning
Rogue's Cunning is a spell-like ability that assassins gain upon reaching 5th level in the class. When used it gives a bonus to Disable Trap, Hide, Move Silently, Open Lock, Pick Pocket, Search and Set Trap of 5 + 1/3 assassin level (maximum of +15 at Assassin level 30). These effects last for 1 turn for every assassin level the character has.