A LOT OF CREATIVE LIBERTIES TAKEN HERE.
To break it down, the key strat of Ishizu is decking her opponent out using Exchange of the Spirit. However, for some ungodly reason, Konami errata'd it and made it completely unplayable. So in order to make her deck, I had to improvise. I felt just making Gravekeepers was lame and uninspired. I didn't completely take them out of the equation though...
This is basically Mudora beat down with some anti meta tech tossed in. Necrovalley stops your opponent from messing with their GY and Kotodama, while keeping with the EARTH Fairy theme, prevents monsters with the same name from being face-up on the field. Also, since all your monsters are EARTH, doesn't hurt to run a Gozen Match, ya? Overall just a cute little gimmick deck that kept to character as much as possible, given that her intended win con is forever lost.