Recently I built a deck called the Artifact Anti-Loss deck. It was classified at the bottom of the page as legacy. If you don't know what I'm talking about, at the bottom of the page next to the deck's price is the deck format, (standard, modern, extended, legacy, etc.) However, I looked up the sets allowed in the modern format and saw that every card in my deck was modern, but low and behold the deck was classified as legacy! Do any of you know why this is?