From the Wizard101 website:

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Decaversary Hoard Pack Bundle!

"Celebrate more than a decade of Wizard101! The Decaversary Hoard Pack Bundle has been added to the Crown Shop! This bundle gives 12 Decaversary Hoard Packs for the price of 10. Don't miss out, this pack bundle will disappear on 9/10!"

Ingame screenshot from the Crown Shop is attached.

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