Card Rulings:Claymore Warrior - Phantom Miria

From "Duel Monsters Expert"

 * If "Claymore Warrior - Phantom Miria" is the only Monster card you control and the opponent is unable to attack her, they can attack your s directly.

Others

 * If an opponent attacks "Claymore Warrior - Phantom Miria" and you activate its effect to move it to another Monster Card Zone, a occurs.