The legality of decks is not being fully checked. Currently, the only check is that there should not be more than 4 of any card. - [ ] Card bannings - [ ] Card legality (_e.g._ no rares in Pauper, nothing from Beta in Modern, &c.) - [ ] Card mulitplicity (_e.g._ only 1 of for Commander and Brawl)
The legality of decks is not being fully checked. Currently, the only check is that there should not be more than 4 of any card.