union arena one punch man booster box UA35BT Japanese There are different cards UNION ARENA TCG: (Case) One

The sleeves can also be used for all standard-sized card games

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

Katakuri 4xEB01-056 1xOP03-099 4xOP03-112 3xOP03-113 4xOP03-114 4xOP04-100 4xOP04-104 4xOP05-102 4xOP05-105 3xOP05-115 4xOP06-101 4xOP06-104 3xOP06-115 1xOP07-109 4xST07-010 Nami 4xOP01-088 2xOP02-063 4xOP02-066 1xOP03-040 4xOP03-044 4xOP03-054 4xOP03-055 4xOP03-056 4xOP06-059 4xOP07-041 4xOP07-054 4xOP07-055 4xOP07-057 4xST03-017 Blue Doflamingo 4xEB01-023 1xOP01-060 4xOP01-073 4xOP01-077 1xOP02-054 1xOP02-068 2xOP04-056 3xOP05-118 1xOP06-044 3xOP06-047 4xOP06-058 4xOP07-040 4xOP07-045 3xOP07-047 3xOP07-051 1xOP07-057 4xST03-004 4xST03-005 Perona 1xOP06-021 2xOP02-112 4xOP02-114 4xOP02-106 4xOP04-083 2xOP05-081 4xOP06-086 3xOP07-118 4xOP01-033 4xOP01-041 1xOP06-118 4xOP06-036 4xOP07-022 2xEB01-013 4xOP02-117 4xOP01-055 Yamato 1xOP06-022 4xEB01-013 4xOP01-033 4xOP01-041 4xOP04-031 4xOP06-035 2xOP06-118 4xOP07-022 4xOP03-116 4xOP06-101 4xOP06-106 4xOP06-107 4xOP01-055 4xOP06-115 Boa Hancock 1xOP07-038 4xST03-005 4xST03-004 4xOP01-073 2xOP03-044 4xOP05-118 2xST12-012 3xOP06-047 4xOP07-040 4xOP07-045 4xOP07-046 3xOP07-047 4xOP07-051 4xOP04-056 4xOP06-058

Make sure you don't forget to kit out all of your monsters with Skills - not just your Ace

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