Grimoire of tremere

The drop of blood that may be used with this spell must be from a person who has betrayed his or her family. The spell animates a wooden or wooden-hafted melee weapon in someone else's hand, and makes that weapon attack its holder until the wielder is dead or the weapon is destroyed. When the spell is cast, the weapon tries to break its wielder's hold (Quickness - Encumbrance stress roll of 9+ to hang on). On subsequent rounds, the wielder hangs on by making Strength stress rolls of 6+, allowed once per round. If a roll to hold on ever botches, the wielder loses control of the weapon and is hit by it automatically (see below). While still in its wielder's grip, the weapon does not strike him or her, but does not strike on the wielder's behalf either. Once the weapon breaks free or is released, it attacks its wielder, using his Attack and Damage scores.
  The former wielder may fight the rebellious weapon. The weapon uses its defense rating as its Defense total. It has a number of "Body Levels" equal to its Space characteristic. One handed weapons have a +6 Soak, and two handed weapons have a +10 Soak. All thrusting and missile weapons used against the controlled weapon suffer -6 on Attack Totals. The spell ends when the weapon loses all Body Levels, or when an hour has passed, whichever comes first. Causing the weapon to lose its Body levels may not destroy it, depending on the quality of the weapon.