Everything

The best scimitar in all creation does its owner no good if it’s lying five yards away from him. Grasp of the Mountain strengthens the spiritual bond between the sword and the swordsman in order to reinforce the wielder’s physical grip on his weapon. A blade that is under the effect of this art never leaves its master’s hand unless he so wills it.

System: For the rest of the scene, the character has a number of automatic successes to resist all attempts to disarm him, equal to the number of successes rolled. He cannot accidentally drop the blade (which means his botches are likely to result in self-mutilation instead of an empty hand). If the character is somehow disarmed in spite of Grasp of the Mountain, he may call the blade back to his hand by successfully invoking this power again, assuming he has a clear line of sight to the weapon.