Challenge (Ex): Once per day, a cavalier can challenge a foe to combat. As a swift action, the cavalier chooses one target within sight to challenge. The cavalier's melee attacks deal extra damage whenever the attacks are made against the target of his challenge. This extra damage is equal to the cavalier's level. The cavalier can use this ability once per day at 1st level, plus one additional time per day for every three levels beyond 1st, to a maximum of seven times per day at 19th level.
Challenging a foe requires much of the cavalier's concentration. The cavalier 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 cavalier's challenge also includes another effect which is listed in the section describing the cavalier's order.
Order (Ex): At 1st level, a cavalier must pledge himself to a specific order. The order grants the cavalier a number of bonuses, class skills, and special abilities. In addition, each order includes a number of edicts that the cavalier must follow. If he violates any of these edicts, he loses the benefits from his order's challenge ability for 24 hours. The violation of an edict is subject to GM interpretation.
A cavalier cannot change his order without undertaking a lengthy process to dedicate himself to a new cause. When this choice is made, he immediately loses all of the benefits from his old order. He must then follow the edicts of his new order for one entire level without gaining any benefits from that order. Once accomplished, he gains all of the bonuses from his new order. Note that the names of these orders might vary depending upon the campaign setting or GM's preference.
Tactician (Ex): At 1st level, a cavalier receives a teamwork feat as a bonus feat. He must meet the prerequisites for this feat. As a standard action, the cavalier can grant this feat to all allies within 30 feet who can see and hear him. Allies retain the use of this bonus feat for 3 rounds plus 1 round for every two levels the cavalier possesses. Allies do not need to meet the prerequisites of these bonus feats. The cavalier can use this ability once per day at 1st level, plus one additional time per day at 5th level and for every 5 levels thereafter.