In case you have not, I will tell you right now, watch Fate/Stay Night FIRST. Otherwise you'll ruin an otherwise great show. For anyone who HAS seen Fate/Stay Night, think of that show, with amazing battles, great characters, and great story. Now multiply every good quality by 12 plus the strength of Excalibur (F x 12E). You now have a very basic understanding of how amazing this show is.