Exploring the Thought Process for Selecting Some Decks to use in the Mythic Qualifier


When selecting a deck for an event such as the Mythic Qualifier
which happens on May 16, 2020, the exercise actually simplifies to a basic probabilistic question. That question is: what is the deck that maximizes the probability that one wins 10 times before incurring two losses? Of course, there is no perfect way to answer this question, as everyone is limited by the information that is available online and their own play experience. However, it still means that one can make an informed decision based on such available information. In this article, I consider the logical reasoning for selecting some of the Tier 1 decks in the current meta, as well as some decks that are not or are no longer Tier 1 but are worth mentioning.
First, it is important to identify what the decks are which populate the current meta, as these are the decks that one is more likely to face at the qualifier. I use MTG Goldfish as the basis for this and identify the following decks as Tier 1 and Tier 2, including estimates of their current share in the meta.
Yorion Lukka (19.55%)
Yorion Bant (14.75%)
Jeskai/RW Cycling (10.62%)
Temur Reclamation (8.31%)
Jeskai Fires (7.01%)
Obosh Sacrifice (5.25%)
Winota Midrange (4.12%)
Rakdos Lurrus (2.66%)
Mono Black Obosh (2.54%)
Mono Red Aggro (2.49%)
Clearly, Yorion decks seem to have taken over the meta. However, Yorion Lukka and Bant Yorion are not the same decks. The numbers show that you are at least twice as likely to see Yorion Lukka than each of the other decks with the exception of Bant Yorion, and you are thrice more likely to see a Yorion deck (Bant or Lukka) than each of the other decks. This should lead you to infer that whatever deck you choose, it must be a deck that is good versus Yorion decks.
Yorion Lukka
Of course, the best Yorion Lukka deck list has a 50% chance of winning against the same Yorion Lukka deck list. Thus, a disadvantage of choosing this deck is you are subjected to the coin-tossy nature of mirror matches. However, this can actually work to your advantage if you can learn the deck well enough to know it better than the average player who will bring it to the tournament.
More importantly, Yorion Lukka is not enjoying a 19.55% share of the meta just because it is popular. It is popular because it is powerful. I did some testing with the deck and found that it can stabilize easily and close out games quickly.
The deck is such that the restriction of having 80 cards is mitigated by the consistency of the list, and ensuring that you have Yorion to cast when you want to cast him lets the deck really explode when the opportunity presents itself. That said, a natural weakness of the deck is that it sideboards poorly. It does not matter what your sideboard contains, your chances of drawing those cards are far less than if you had 60 cards in your deck. This makes the deck somewhat predictable. For example, when considering if the pilot has a counter spell or some other hate card in hand, chances are the he/she does not.  Thus, I think that the deck is favored versus every deck in the list except Jeskai/RW Cycling,  Yorion Bant, RDW, or Temur Reclamation.  Yorion Bant and Temur Reclamation are faster than Lukka because of their ramp aspect, while Cycling and RDW are still fast aggro decks that can close out games before the Lukka Yorion deck can stabilize.

Jeskai/RW Cycling
The cycling deck is pretty impressive. No rare in the main board except for Lurrus, and you don’t even need to cast Lurrus most of the time. The deck is resilient to mulligans, making aggressively taking mulligans to get a turn 1 Flourishing Fox a valid strategy. Not only is it good versus Yorion decks in general, but it gets better after sideboarding because of the inherent weakness of Yorion decks to utilize a sideboard. However, the deck does have its own bad matchups. It is likely that any aggressive deck with some interaction to dispatch the fox has a positive win rate versus this deck. The matchup gets worse post board as these aggressive decks can then adjust to be the control deck in the matchup. This is especially true for decks like Obosh Sacrifice, Rakdos Lurrus, or even RDW. Nonetheless, all of these decks that the cycling deck is bad against are Tier 2 at best. Thus, it is less likely that you will face them compared to the decks that cycling is good against. Of course, this does not mean that you will absolutely not face them in the tournament, but the cycling player is definitely banking on the well-thought chance that he/she wont.
Jeskai Fires
Jeskai Fires was once king of the hill. I took the deck to two 7-win finishes in the Metagame Challenge and only did less than 3 wins once in 8 runs, whereas my 3 runs with the cycling deck was a disappointing 3-wins, 1-win, 1-win. This shows how much and how quickly the meta can change. Fires is an excellent choice in a field of Lurrus and Obosh decks, decks that are fast enough to be considered aggro decks but give up speed in order to lord it over smaller aggro decks like RDW or Cycling. Unfortunately for Jeskai players, Yorion decks have pushed those decks back, and Yorion decks are themselves resilient enough to withstand the initial burst of damage from Cavaliers and Kenriths while having a much more powerful late game. Still, there is a good argument to be made that in a situation where most players overthink and make their deck choices based on the assumption that most of the decks will be Yorion or cycling decks, they will end up choosing decks that are good matchups for Jeskai Fires.
Temur Reclamation
Temur occupies a curious spot. Huey Jensen called it thebest deck without a companion. It is faster than Yorion Lukka and Fires decks and carries enough counterspells to get those decks off their game plan. It is weaker than either deck to aggressive strategies, but with RDW mostly absent in the meta, only the cycling deck is left as a true aggressive threat to Temur Reclamation. Both Obosh and Lurrus dictate decks to play smaller creatures (more one drops in the case of Obosh), making them more susceptible to flame sweep after sideboarding.
Winota Midrange
Winota is one of those decks that does well or does not depending on the underlying probability related to doing what it wants to do. It has little in the way of stalling or ramping like Yorion, Fires, or Reclamation decks do, but convincingly wins on turn 4 when it does get to fire its guns. Whether or not to choose decks like this really depends mainly on how well it’s been found to perform, and in the case of Winota, it seems that it has been found wanting. There are likely more games when you will need to do without Winota to win than games when you will get to execute the combo.
Rakdos Lurrus/Obosh Sacrifice/Mono Black Obosh
Players who choose either of these decks are hoping that, as has happened in many big tournaments, people end up choosing aggro as their weapon of choice. Also, knowing that Fires has been pushed back, it may be possible that either deck can sideboard well enough to focus on beating Yorion Lukka, and maybe altering the list to be aggressive enough to kill Bant Yorion and Temur Reclamation before either deck can execute their game plans.
Other decks?
In choosing a deck that is not among those that were already considered, it is important to consider how the deck would fare against each of the decks identified in the list. For example, I briefly tested Simic Flash based on the contention that it had been very good before versus Fires and Reclamation decks and is likely good against 80-card decks. Testing the deck, I found that while the deck is indeed good versus Yorion Lukka decks, it struggles considerably versus Uro, Growth Spiral, and Shark Typhoon, cards that are in both Yorion Bant and Temur Reclamation. Add to this its inherent weakness versus small aggro decks and I conclusively decided to drop the idea.
Conclusion
Ultimately, there is no 100% correct choice for which deck to use in the Mythic Qualifier tournament. You can choose RW Cycling and get matched versus three Rakdos Lurrus decks in a row, getting your big bad fox stolen and exchanged for two food tokens each game. Remember that even if you end up correctly choosing a deck that has a 70% win rate versus the field, that still only translates to an 11.29% chance to make it to 10 wins before your second loss. Nonetheless, choosing a deck that has a true win rate of only 50% translates to a 0.57% chance, so there is definitely value in making the most reasonable decision you can.

Comments