
Both of these are BO1 formats (vs Traditional draft, which is BO3). To provide more detail about limited specifically, ranked limited in MTGA comes in two forms - Premier Draft and Quick Draft. Wizard’s Chris Clay has stated on twitter that “The top player in the Mythic Rankings has the highest MMR in the game.” So it’s safe to assume that if you’re doing well in Ranked play, you’re stomping it in other areas of MTG Arena as well even though your matches aren’t determined by your MMR here. Even though MMR isn’t used in these formats, it does give you a good idea what your performance and skill-level are outside Ranked play. In these formats, your Rank (not your MMR) determines who your opponents are by matching you with other players that have the same Rank as you.

Ranked BO3 matches for historic constructed format decks.

Ranked BO1 matches for historic constructed format decks.Ranked BO3 matches for standard constructed format decks.Ranked BO1 matches for standard constructed format decks.The ranking system is also used to determine who’s eligible to participate in MTG’s championship event, the Mythic Invitational. This is done is to make sure you’re paired with opponents that have a similar MMR and that you and your opponent are balanced to each other’s skill-level. In other words, the system can tell who’s the best and who’s the worst for each of the three MMRs (Open Play, Constructed, and Limited) using the gathered data. The ranking system creates a list that determines the rank for each player by applying this type of data collection to everyone that plays MTGA or who participates in events. They’ve designed one for Open Play, one for Constructed, and one for Limited. WotC uses three different types of MMRs in MTG Arena. By gathering this information as you play events, the rating system figures out where you fall and gives you an MMR ( match making rank). This is determined using a Glicko rating system, which we’ll talk more about later.

At its core, it’s used to assess your skills and strengths as an MTGA player and give you a rating (or, in this case, a rank) based on that. The first obvious question when it comes to the ranking system is why it exists. What is the MTG Arena Ranking System Used For?
