Grail usually refers to something you don't have and are searching for. In that sense, the 1997 Row 0 Masterpiece Larkin would probably be a true grail for me.
The OP suggested we post what is our grail card that we own. For me, this was my grail for 25 years. I eventually got one earlier this year. It is my PC player, in my favorite set of all time. And best yet, it's jersey number 11/25!
