A new era of Dueling is almost upon us.
Series 11, Booster 1 – Rise of the Duelist
-Release Date: 18th of April 2020
-20th Secret Rares will be replaced by a new type of rarity called Prismatic Secret Rare
-Ultra Rares will increase from 6 to 8
Source: https://yu-gi-oh.jp/index.php?page=details&&id=700
