D&Dtools1

Benefit

You can throw a weapon in such a way as to fool your foe into believing that the thrown weapon is not moving closer, or moving closer too slowly to be an effective attack. A victim of your Neraph Throw attack may not apply its Dexterity bonus to its Armor Class. All conditions that pertain when a foe cannot apply his Dexterity bonus to Armor Class also pertain to the Neraph Throw attack, if any (for instance, a sneak attack also could be made with this attack if you can make such an attack). Once you have used a Neraph Throw attack against an enemy (regardless of the attack's success), any later attempts to use Neraph Throw against that enemy in the same encounter automatically fail. Once a foe sees the attack in action against himself, the foe can discern it for what it is for the duration of that combat.

Special

Neraph Throw has no effect against foes who can't see you.