If you are trying to use an access code to get into the game and it's showing up as invalid, please first check:
- that you have downloaded the MTG Arena client and are entering the code there - the code is not intended for the https://magic.wizards.com/en/mtgarena website promo code box
- that you are entering it in the format XXX-XXXX-XXX (including the dashes)
- that you are not entering any leading or trailing spaces
- that you are only entering a single code
If the code still isn't working or is displaying as already used, send us a request and we'll investigate why the code isn't working.