You alter the nature of one weapon and create a psychic conduit between it and the power of the terrible blackstone gigant. Although the base damage of the weapon is unaltered, the weapon deals bludgeoning damage for the duration of the power. In addition, the weapon now has the power to petrify those it strike.
If a creature struck by a weapon affected by blackstone hammer fails its saving throw, it (along with all its carried gear) is turned into a mindless, inert statue. Striking a creature with the weapon discharges the power. If a statue resulting from this power is broken or damaged, the subject (if ever returned to flesh) has similar damage or deformities. The creature is not dead, but neither does it seem to be alive when viewed with spell's such as deathwatch.
Only creatures made of flesh are affected by this power.
For every 2 additional power points yous pend, you can invest the weapon with an additional charge. Each additional charge allows the weapon to be used one more time before the blackstone hammer effect is discharged.