1. A new region, the Underground, has been added. 24 new underground cards have been added, along with 9 related cards. 2. A new hero has been added. They explore the Underground, Ocean, and Ice regions, and must use various volatile cards according to the situation. 3. Bugs have been fixed: - Volume control did not apply until the settings window was opened after starting the game - The screen was displayed abnormally when clicking the continue button multiple times on the main screen