5 World Build Masters
This set was released on August 5th, 2017.
Contains Dragon World, Magic World, Katana World, Ancient World, Legend World, and Generic, as well as 1 life counter, 1 rule book, and 1 playsheet.
57 card types (7 new cards, 3 reprints, and 1 card with RRR treatment for each World; 6 new cards, and 1 reprint for Generic)
As it contains many reprints of staple cards, you will be able to build decks from scratch of Worlds you've never played before!