After Hoseki enters play: Lose 2 Honor.
Hoseki may attach Spells and perform their actions if she were a Shugenja, but she will not have more than one Spell attached, and when she performs a Spell action, its effects are considered Ninja effects instead of Spell effects.
"Her eyes were firelight, hair of smoke, and a blade in her hand that was darkness itself. But I did not look upon her, after all, she was never there to see…"