Cards you own in and out of play with "Daidoji" in their titles or as part of any of their keywords have their Honor Requirements lowered by 5, which may drop them below 0 despite minimums.
Non-Samurai, non-Shugenja Personalities enter play for you paying 3 more Gold.
Battle:
Any number of times per turn, bow this card, choose your unbowed performing Samurai, and target an enemy Personality: Your Personality challenges the other. He may refuse; if he does, move him home, bow him if he moved, and dishonor him. Destroy the duel's loser.