Forum:Six samurai and other questions

My question is : if TSS Irou is equipped with 1 Spirit of the six samurai and they are my only cards on my side of the field, Irou uses his effect and if it ataack an face down monster would be destroy it? remember, in this case irou is equipped with spirit of the SS. If its possible, can relinquished use Dark magic attack if it is equipped with a dark magician? An ultimate uqestion, Ancient rainbow city effect to negate the spell or trap cards shall use te crystal beasts in monster zone or spell and trap zone?

n_n thanks for answering