Weapon and Armor Proficiency: Mirumoto niten masters do not gain any additional weapon or armor proficiency.

Niten Technique (Ex): Unique among the samurai of Rokugan, the Mirumoto niten masters learn to fight with the katana in one hand and the wakizashi in the other. Unlike the style of the Two-Weapon Fighting feat, however, this technique does not teach the use of the off-hand weapon to attack. Instead, the wakizashi serves as a shield, adding a +2 armor bonus to the niten master's AC while he is wielding both weapons. This bonus stacks with other armor bonuses except for the bonus from a shield. The bonus rises to +3 at 4th level, to +4 at 7th level, and to +5 at 10th level. The niten master does not suffer a penalty to her primary attack while wielding the wakizashi in this way. If the niten master uses the wakizashi to attack, she loses this AC bonus until her next action. A magic wakizashi does not add its enhancement bonus to the niten master's AC unless it is a defending weapon or has been otherwise specially enhanced for defense.

Aid Shugenja (Su): At 3rd level, a Mirumoto niten master can use her own personal energy to empower a shugenja's spell when she is the target of that spell. The spell is treated as if the shugenja had used the Empower Spell metamagic feat, including the longer casting time. The niten master can use this ability once per day at 3rd level, twice per day at 5th level, three times per day at 7th level, and four times per day at 9th level.

At 9th level and above, the niten master can apply the Maximize Spell feat to spells cast on her instead. She must decide before any applicable dice are rolled whether she wishes to maximize or empower the spell.

A niten master cannot empower an already empowered spell, or maximize an already maximized one.

Diamond Soul (Ex): At 8th level, the Mirumoto niten master gains spell resistance equal to 20 + her Charisma modifier. In order to affect the niten master with a spell, a spellcaster must roll the niten master's spell resistance or higher on 1d20 + the spellcaster's level.