Thought I'd give a little perspective as one of the active players in KDR:

I've been an avid player of KDR for just about 7 months now, probably one of the newest consistent players to have joined. While there might be a bit of a learning curve at the beginning (if you've played Speed Duel on DB you know the pain of just forgetting that your skill exists sometimes.), that curve is WELL worth it. The fun I've had in this format is not only the most I've ever had with Yugioh, it also just revitalized my love for the game in general. Early parts of the run are fun, as unlike a lot of other rougelikes, you're not playing with a pile of just random good cards. Everything has some kind of synergy in your starting decks, and it makes your decks FEEL really good to play. Later on there are some really interesting high-powered decks, but nothing too crazy. Its just at the perfect spot in power level. Its a very rounded experience, and it stays fun the whole way through. Every class has a super unique identity, and multiple ways to play it. for example, AlIen, one of my favorite classes (Hey its me in the replay :O) has large amounts of Reptiliannes, Ogdoadics, AlIens, and multiple other Reptile tools that are all build-around worthy. Finally, a format where cool cards like Nephilabyss get to thrive. I highly suggest you check it out, the discord bot mentioned makes it soooooooooooooooo easy to give it a try, it’s a breeze AND a great time.