138K accounts from MagicDuel (magicduel.com) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Email addressesIP addressesNicknamesPasswords
In August 2023, the MagicDuel Adventure website suffered a data breach that exposed 138k user records. The data included player names, email and IP addresses and bcrypt password hashes.
Source: Have I Been Pwned (CC BY 4.0)