The White Tiger Dao

When fighting in a Challenge, the user of this weapon gains a bonus to their Initiative value equal to the value in brackets after the rule when making attacks with this weapon. If there is no value in brackets after a given instance of this special rule, then assume the value is 1 (thus adding +1 Initiative to that model).

In a turn in which a model with this special rule Charges into combat, it adds a bonus to its Strength Characteristic until the end of the Assault phase.The bonus added to the model's Strength is equal to the value in brackets after the special rule, for example a model with FuriousCharge (2) adds a bonus of +2 to its Strength.
A model that has made a Disordered Charge that turn receives no benefit from Furious Charge (sec page 182).

Attacks with this special rule cause Instant Death on a To Wound roll equal to the number in brackets associated with the specific rule. Roll any viable Saves against this Instant Death-causing Wound separately and before any other Wounds the attack inflicts.

Weapons with the Master-crafted special rule allow the bearer to re-roll one failed roll To Hit per turn with that weapon.