Seattle-based publisher Hidden City has announced the Bella Sara Magical Friends set, a 123-card expansion for its Bella Sara virtual world and trading card series.

The Bella Sara Magical Friends set marks the sixth release for the online horse stable's collectible card series. Bella Sara claims to have amassed more than 2.5 million registered users and offers games, puzzles, coloring pages, storybooks, and customizable cottages at its site.

As with Bella Sara's previous cards, players can buy card packs and activate Magical Friends cards for new horses, nurturing them at Bella Sara's virtual world. Card packs contains 7 different cards each and can be bought at retailers such as Blockbuster, Target, Toys ‘R’ Us and Wal-Mart.

Said Hidden City Games CEO Peter D. Adkison: “Bella Sara Magical Friends celebrates the powerful connections of friendship by pairing each new horse with a whimsical, lifelong companion. We invite Bella Sara fans and kids everywhere to meet these new characters and explore the rich and growing fantasy land of North of North."