Hey MTG App dev team!
I'm hoping that development for the app is in its early enough stages that my suggestion here will have some weight to it, and give a bit of pause. Because I really care about what I'm gonna write here, and I believe y'all can deliver. You're the only ones that can deliver at this point. It's something that no other major "card game" app dev/publisher has done.

One handed. Portrait oriented. Gameplay.

Now, hold up, before you leave, let me explain:

You don't have to scrap the landscape functionality, of course... but having the option, to be able to rotate your phone, and use a single hand while playing, when you're limited to one hand... that's got to be feasible.

Y'all don't have to do it for me. Think of how much more accessible it is to people who simply can't use two hands either because they don't have a second hand from some freak/war/anything accident, or those whose other hand is lame right from birth or something. Hearthstone, Gwent, they don't offer portrait mode gameplay. Imagine the praise from the minority when they come to you because it's a feature that you have over everyone else.

And it wouldn't just be for them, but people like me. Who kills time "pretending" to be doing important things on my phone in portrait mode. I can't fool anybody that I'm doing important things like looking at the stock market the moment I turn my phone landscape, they know I'm up to no good with a game or something. Right? Or how about other people who have two hands but are incapable of using one, because they're holding a bag, or a ******** the subway, or the hand of a loved one (paha). There's so many benefits to portrait, even before we consider the benefit of having a card game based game in portrait mode to begin with.

Beyond just catering to make a better phone experience overall, this is a card game. Having the possibility of a portrait mode would allow me to be able to view the card art in all its glory in proper aspect ratio. Players wouldn't have to read tiny words. It would just fill the screen naturally. How much more gloating could I do, in showing off my planeswalker, when I have my phone in portrait mode, the card filling the entirety of the screen as I brag to my friends of my latest pulls. Sure, initially, you might have it so that not all cards are viewable on screen when battling. But do I need to see how many lands I have? Not really. Would you have to do some creative things with camera angles and UI when it comes to the attack phase, maybe. But cards are vertical. It's only natural that everything should fit and feel right at home in the vertical orientation because phones are just about the same size and aspect ratio as physical cards. I can't tell you how many card games I've opened that I've stopped playing because I just don't have the time to dedicate two hands to my phone. So I download alternatives that do. And they're usually not even card games. But I wish they would be.

You want a good example of an app that can be literally any orientation, any size, and still work? Elder Scrolls Blades. Boring game, but you can play that game portrait, landscape, *, I've even played it *half sized by splitting my phone screen in two, with a youtube video on top, and the game on bottom. And Blades still runs FLAWLESSLY. It's extremely versatile and caters to the phone market and power users. Which once again, no big time card games on the market (that I've ever played) do. Imagine the dominance MTG could have in this area. It's a good move. And even if it's half baked and bugged to ** in some shadow realm beta-channel, you're gonna have people (like me and the others above) singing absolute praises.

And heck, this portrait functionality could extend and be beyond helpful to those on tablets, and those coding weirdos with the vertical monitors. Everyone benefits. Literally everyone. And with foldable and flippable phones coming in the near future, why not just get that portion of the coding done and ready to go before the revolution? Already be ready for the tech coming everyone's way. Like ES: Blades is gonna be.

If vertical orientation is implemented, I would absolutely dedicate more time to MTG. I'd buy packs. I'd get into the ol level up tree system season pass thing or whatever it is. Why? Because now it's accessible at any time, and any place. Not just those times and places that require both of my hands, but at times where I've only got one hand, and times where I've got an image to uphold of me pretending to look smart or involved or sophisticated or whatever paha.

I just can't stress enough how important a portrait mode would be for pushing into the mobile market. And with Magic, my most beloved card game of them all, I would hope that you guys do it better than everyone else, and do it right. Don't let this be just an suggestion from a wackjob of a person that's read a single time by some poor person who manages the forums, but really, REALLY consider how portrait mode could benefit the longevity of the app. How it could benefit everyone through a few slight changes of accessibility. I crave to play more MTG. But without portrait mode, for me, it's just going to die off, like the card game apps before it. Thank you for your time.