This feat transforms one of your limbs into a shadowy substance, while still taking the shape of your hand, your limb can now change shape as long as the shape isn't more larger than the original volume of your limb, if it is one of your legs, then you get a +2 dexterity bonus, if it is your hand, then you gain a +2 strength bonus, it also gains you abilities of the void which you can use at will, including:  Shadow strike- you can apply this on any attack, it freezes the opponent in place until something interacts with the person and deals +5 damage. Void Phase- this ability makes you etherreal and you cannot be attacked, you also cannot attack people, you can also fly,  this spell will never end unless you will it to.