Specifically clarifying how many new cards come with this set.

DIMENSION BOX -LIMITED EDITION-

Release Date: November 26th, 2016

Price: 3000 Yen (Minus Tax)

・4 Special Cards ※ Extra Secret Rare Parallel Foiling

・1 Set of a ARC-V Special Card Set (45 Cards)

※ 15 Ultra Rare Parallel Foil Cards, 30 Normal Parallel Foil Cards

・1 Special Storage Box

・4 different Special Card Cases (Made of Foil Paper)

・60 Special Protectors (i.e. Card Sleeves)

Details:

・The ARC-V Special Card Set includes 15 new cards and 30 reprinted cards used by major characters (from ARC-V) including Sakaki Yuya.

For clarification, while the 45 cards look like it should be a Deck by the number of cards, it is listed as a Special Card Set, and everything from description points to it being more of a miniature “Legendary Collection”.

Source