Increases the damage dealt by Sinister Strike and Backstab by 5/10%, and your damaging melee attacks have a 10% chance to Daze the target for 4/8 sec.
Blade Twisting is a 25 point Rogue talent located in the 6th tier of the Combat Tree. This talent gives Sinister Strike and Backstab damage increases and gives melee attacks a chance to daze targets.
/Patch 3.0.2 (14-Oct-2008): "Blade Twisting (Combat) now cause all damaging melee attacks to have a 10% chance to daze for 4/8 seconds, movement speed reduced by 70%, also adds 5/10% dmg to Sinister Strike and Backstab." (Source) Previously the effect was "Gives all melee damage from the rogue a 10% chance to Daze the target for 4/8 sec, slowing movement speed down by 70%, and giving a 5/15% damage increase to Sinister Strike and Backstab."