Recently I’ve seen Josh H. Post several powerful combos for teams
AKA, why teams is busted and makes no sense.
I will say that my feelings last year were that #Mayhem shouldn't have even happened at all (this new Mayhem
should've been avoided during FoM testing when it was errata'd again; Jehu+Asahel could've been avoidable; etc). Yet it was allowed to pass testing, and now a new rule people have to remember (CTB can only choose opponent's EC) is in place. Now, I think this is a great rule for reducing NPE, but it really should've been implemented
beforehand. And that's basically the history of rulings. Strong combos that leave little interaction or require prior knowledge or
perfect (and nothing short of that) counterplay are allowed to profit until they're nerfed the year after- Confusion & Liners in 2016 by the introduction of Covenant of Prayer and the Liner ban, CoL in 2017 by the errata, and #Mayhem in 2018 by the change to CTB.
I disagree strongly with this practice, but I do think the game is progressing in a good direction overall. And, as someone who spends very little time looking at cards to specifically try to find game-busting combos (or even in general), I do appreciate very much those that are open about it. I don't really feel like this was a problem in years past (outside of weird T2 decks), and have no problem with people wanting to keep decks secret. But with so many cards still in the pool and so many new cards doing so much, those combo possibilities are now more than ever, and so the chance of combos like these slipping through the cracks are greater as a result.
I'd applaud but these 'secrets' are not really secrets after the first game they're used in. They really only remain secrets until Nats because of how small the playerbase is and how few people actually spoil strong combos that they see played against them. In that sense, our players are quite honorable.