The ocean is filled with pirates seeking the treasures of Euforia, a long-lost kingdom that sank to the bottom of the ocean, taking its magical treasures with it. Ishut, a young hot-blooded pirate, wants to become one of the greats. At first it doesn't seem like he has much going for him beyond spirit but as he discovers his connection to the sunken kingdom, his powers to use Euforian crystals will awaken.

This spinoff of Sting's Dept. Heaven series picks up where Yggdra Union and Blaze Union left off, continuing their unique blend of card game, turn-based strategy and real time strategy. Gloria Union introduces a variety of new cards, for a total of 48, and introduces the ability to use the Gloria pirate ship and its unique traversal skills.