I've made an Heirloom Legality Checker for paper magic. I'm using it locally right now and is working great. I want to add the MTGO Heirloom legality before I upload it but I can't find the way to get the MTGO Traders price, maybe you know of someone who could help. Here is the code It's like three lines that have to be modified. Also I would like to see some deck ideas for paper Heirloom and I'm sure changing the card base for a month would be exciting for the players of this format. Maybe I should upload it as it is and let some people in the casual forum try the format. But the competitiveness of the Heirloom tournament would generate great decks faster.