[Update #2]: Innistrad: Midnight Hunt has now landed alongside the yearly Standard set rotation.
[Update]: All of Innistrad: Midnight Hunt's expansion cards have now been revealed.
It has only been a little while since Jumpstart: Historic Horizons brought in a ton of cards to MTG Arena, and already a brand new set is inching closer. Innistrad: Midnight Hunt will be arriving onto MTG Arena on September 16th alongside a whole assortment of zombies, werewolves and spirits, while the physical version will be launching a week later, on September 24th.
As you would expect from an Innistrad set, the mechanics this time around are all about transformations and graveyard interaction. So not only are we getting werewolves that transform between two forms based on the time of day, but we're also getting flashback-style mechanics for both creatures and instants/sorceries.
The way the whole day/night cycle for the new werewolf cards works is fairly simple. If a player casts no spells during their turn, it will become night at the start of the very next turn. Then, if a player casts two or more spells during their turn, it will switch back to day at the start of the next turn. Needless to say, it's a pretty interesting mechanic since both players are able to interact with it fairly easily, yet only really reap the benefits during the next turn.
You can get a bit of a sneak peek at what these day/night cards will be like in action, as well as what else will arrive as a part of Midnight Hunt, over at the MTG website. The list of revealed cards is currently a bit small so don't expect to see all of the heavy hitters, but considering that the spoiler season has just officially begun we should be able to see all of the cards fairly soon.
So once Wizards of the Coast reveals the full list of cards for Innistrad: Midnight Hunt I'll make sure to let you know. Until then, you can read a little bit more about the set, and MTG's future in general, over at the recent developer update.