Once per day, a samurai can challenge a foe to combat. As a swift action, the samurai chooses one target within sight to challenge. The samurai's melee attacks deal extra damage when made against the target of his challenge. This extra damage is equal to the samurai's level.
Challenging a foe requires much of the samurai's concentration. The samurai takes a –2 penalty to his Armor Class, except against attacks made by the target of his challenge.
The challenge remains in effect until the target is dead or unconscious, or until the combat ends. Each samurai's challenge also includes another effect, which is listed in the section describing the samurai's order.
Whenever an order of the dragon samurai issues a challenge, his allies receive a +1 circumstance bonus on melee attack rolls against the target of his challenge whenever he is threatening the target.