"We are planning an upcoming B&R announcement," says the company. "In that announcement, we plan to ban Uro, Titan of Nature's Wrath in Pioneer, Modern, and Historic. Additionally, we are continuing discussions about doing the same in Legacy."
The rare pre-ban announcement comes due to the card being part of the three-card "Showcase: Kaldheim - Part 1" drop, which also includes the cards Frost Titan and Primeval Titan featuring Kaldheim's unique showcase frame and art by WolfSkullJack, Christopher Lovell, and Richard Luong.
"While we are still working internally on the larger B&R announcement for that week, we wanted to share this information ahead of this sale," WotC comments.
According to the website MTGArena.pro, Uro is used in only about seven percent of all decks on MTG Arena yet decks that run the card have a better than 50% win rate.