union arena one punch man booster box UA35BT Japanese There are different cards They finally added One Punch

For the full official announcement and Wizards' complete reasoning for each ban, the MTG Arena Announcements for April 20, 2026 covers everything directly from the source

No claims, no returns

Karn, Scion of Urza has been falling as well since it seems to be merely a very good card instead of a silly broken mistake like so many people (including myself) assumed it was early in the format

Use Sapphire-like smoothing or low-curve cantrips so your deck always does the thing on time

The one thing that really bothered me when making this list, though, was that there wasn't really a whole lot to get to utilize when it came to Mazzy's Red side