The compensation has been determined to address the issue with a display in select floors of the Quest Dungeon, Samurai Shodown Quest.
See here for the original announcement about the issue. Compensation details are included below: - 1 Magic Stone for all users that entered the affected floors before 11/11 (Mon), 5:40 PM (PST).
We sincerely apologize for the inconvenience and appreciate your understanding.
Thank you for playing Puzzle & Dragons.