MTG Arena typically says you have banned cards in your deck when one or more cards is not allowed in the selected format
We havent yet had a full reprinting of Collector Boosters, just Draft/Play boosters, and theres no reason to think that Wizards will change that policybut they are changing a LOT of things and nothing is 100% in this crazy world
Second, once you spend the $5 to upgrade your account, you can fully free-to-play Magic Online without spending another penny, all while accessing tens of thousands of cards, hundreds of decks, and oodles of formats, all for free
This artifact's owner draws a card, then that player may put a land card from their hand onto the battlefield
Get rid of something like Gaeas Cradle or Nykthos, Shrine to Nyx to make a lot of mana
Most casual players are willing to trade a couple of exiled cards from their library to add another land to their fat stack, and you net cards quite often
