No, that's not some sort of crazy, new figure that is a book that's gained sentience out on the battlefield. Corvus Belli has announced that they're making their way back over to the core Infinity rulebook and have noticed some stuff they want to fix. As such, they're going to be updating it early next year with a new version.
From the announcement:
OFFICIAL ANNOUNCEMENT REGARDING N4 RULES AND FAQs
Hello there, Infinity players!
As you're all aware, we've recently completed a Kickstarter campaign for an arena multiplayer battle game based in our deep and rich universe - Infinity Deathmatch: TAG Raid. Having placed all our passion and effort into it doesn't mean that we've set aside our main product: Infinity.
That's why we want to tell you that we're working on something that's paramount to the game's health: a living rule book. This means that we're working to update the rule book with every FAQ and errata that has arisen during this year N4 has been live, in order to have the rules PDF as complete as possible.
The release of this revised rule book, which will come as a completely free update via PDF, will take place sometime during the first quarter of 2022.
Before the release of the updated rule book, we can confirm that we'll have a new edition of the FAQs by the end of January and that we'll resume the normal FAQ publication schedule once we've updated the rules.
Likewise, we can tell you that we foresee the new Fireteam rules arriving sometime before summer of 2022.
Thank you all for your support and your passion for Infinity!