(The following information is for the EU, if the US has different rules we’ll bring those up.)

First off: Releases will be accelerated from once a month to once every two weeks.

Releases are planned to be regular and consistent for the next several months for break periods.

7 of the 12 new cards are:

• Tragedy
• Ghost Sister & Spooky Dogwood
• Harpie Channeler
• Dark Magician Girl
• Harpie Queen
• Alluring Mirror Split
• Frightfur Leo

Also, be aware, cards won’t be in the same order everywhere. Some stores might get Dark Magician Girl before Tragedy and visa versa.

Source