Black Blade (Ex)
Replaces: This ability replaces the magus arcana gained at 3rd level.
At 3rd level, the bladebound magus’ gains a powerful sentient weapon called a black blade, whose weapon type is chosen by the magus (see sidebar). A magus with this class feature cannot take the familiar magus arcana, and cannot have a familiar of any kind, even from another class.
The bladebound magus’s arcane pool has a number of points equal to 1/3 his level (minimum 1) plus his Intelligence bonus. This ability replaces the magus arcana gained at 3rd level.