you must be a bigger newb then me myth........ holy day is a white card, while shrapnel blast is a red card. you have to sacrifice an artifact to play shrapnel blast, holy day duznt have any requirements. shrapnel blast is a pile when i dont have n e artifacts in my deck while i can put holy day on an isochron sceptar and be invincble (almost). so if you choose shrapnel over holy day, someone needs to whack you.