Casual Tournament (unsanctioned for now)
Pack per win
build a 60-card Standard-legal deck around a legendary creature or planeswalker. You can only have one copy of any given card in your deck other than basic lands. Your legendary creature or planeswalker starts in the command zone and works the same way that you might be used to from Commander: you can cast it for its mana cost, and then again for an additional two mana each time. Each player starts with 30 life.
More details about this new format can be found here- https://magic.wizards.com/en/articles/archive/ways-play/join-brawl-2018-03-22