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That hidden Jace sticker has Arena players poking around the battlefield and comparing notes on how to trigger the easter egg. MTGAzone lists mtg arena codes alongside the usual reward details, so you can check promo options without bouncing between scattered posts. The Jace secret is a good reminder that Arena freebies are not always just a code typed into the store; some rewards ask you to notice what is happening in game. Have a look before your next session, check what applies to your account, and pass the useful bits to your playgroup before the next ladder grind.

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