Mind Blade (Su): As a move action, a soulknife can create a semisolid blade composed of psychic energy distilled from his own mind. The blade is identical in all ways (except visually) to a short sword of a size appropriate for its wielder. For instance, a Medium soulknife materializes a Medium mind blade that he can wield as a light weapon, and the blade deals 1d6 points of damage (crit 19–20/x2). Soulknives who are smaller or larger than Medium create mind blades identical to short swords appropriate for their size, with a corresponding change to the blade’s damage. The wielder of a mind blade gains the usual benefits to his attack roll and damage roll from a high Strength bonus.
The blade can be broken (it has hardness 10 and 10 hit points); however, a soulknife can simply create another on his next move action. The moment he relinquishes his grip on his blade, it dissipates (unless he intends to throw it; see below). A mind blade is considered a magic weapon for the purpose of overcoming damage reduction.
A soulknife can use feats such as Power Attack or Combat Expertise in conjunction with the mind blade just as if it were a normal weapon. He can also choose mind blade for feats requiring a specific weapon choice, such as Weapon Specialization. Powers or spells that upgrade weapons can be used on a mind blade.
A soulknife’s mind blade improves as the character gains higher levels. At 4th level and every four levels thereafter, the mind blade gains a cumulative +1 enhancement bonus on attack rolls and damage rolls (+2 at 8th level, +3 at 12th level, +4 at 16th level, and +5 at 20th level).
Even in places where psionic effects do not normally function (such as within a null psionics field), a soulknife can attempt to sustain his mind blade by making a DC 20 Will save. On a successful save, the soulknife maintains his mind blade for a number of rounds equal to his class level before he needs to check again. On an unsuccessful attempt, the mind blade vanishes. As a move action on his turn, the soulknife can attempt a new Will save to rematerialize his mind blade while he remains within the psionics negating effect.