


Yu-Gi-Oh! Battles of Legend: Monster Mayhem Booster Pack - EN
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Preorder! Note availability date below!


Yu-Gi-Oh! – Battles of Legend: Monster Mayhem Booster Pack (EN)
Immerse yourself in epic duels with the Yu-Gi-Oh! – Battles of Legend: Monster Mayhem Booster Pack (English Edition) . This booster combines sought-after reprints with brand-new cards and exclusive rarities – a must-have for collectors and competitive duelists.
Contents per booster
- Maps of the Battles of Legend: Monster Mayhem series
- Language: English
- New & in original packaging (Sealed)
Highlights of Monster Mayhem
The Battles of Legend: Monster Mayhem Edition combines iconic classics with new monsters, spells and traps. With special rarities and collectibles, this set is equally interesting for tournament players and collectors.
Why a booster pack?
- Ideal for collectors & duelists
- Exclusive rarities & valuable reprints
- Original English version – playable worldwide
Get the Yu-Gi-Oh! – Battles of Legend: Monster Mayhem Booster Pack (EN) now and expand your collection or tournament deck with the latest cards and classics!
All orders are shipped from Germany.
- Delivery time: Usually 1-3 working days.
- Pre-orders: Will be shipped on the release date.
- Same day shipping: Orders placed before 10:00 am.
- Shipping costs: Insured and climate-neutral DHL shipping (GoGreen) for 4.99 €
- Free shipping: Within Germany for orders over 150€.
- Further information: All further shipping information can be found here: Shipping information cardcosmos
You can pay with the following methods in our checkout:
- PayPal
- Klarna (installment payment & invoice)
- Credit card (Visa, Mastercard, Maestro, Amex, UnionPay)
- Apple Pay & Google Pay
- ShopPay
- The release date is . Shipping is expected upon release.

You have questions, we have the answers
Can't find what you're looking for? Visit our Help Center – we're here to help.
All pre-orders will be shipped on the official release date. Our goal is for you to receive your product right when the new set launches – often it even arrives on the release day itself.
Yes, that's possible. However, please note: If your order includes pre-orders, the entire order will be shipped together on the release date. This way, you save on shipping costs and receive everything safely in one package.
Sometimes manufacturers or distributors postpone the release date at short notice. Should this happen, we will of course inform you immediately by email about the new shipping date. Your order will remain secure.
Pre-ordering lets you secure your desired products before they potentially sell out. Especially with limited editions and popular TCG releases, pre-orders are often the only way to be there on launch day.
In 99.9% of all cases, we can fulfill every pre-order, as we deliberately and cautiously adjust our available quantities only after receiving guaranteed delivery commitments. Should a manufacturer or distributor nevertheless deliver less stock, we will inform you immediately and offer you either a refund or – if available – an upgrade to a similar product. Of course, you can cancel your pre-order at any time before shipment.
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We are three friends with a passion for trading cards—and that's exactly how cardcosmos was born. Since our founding in 2024, we've put our heart and soul into every product. With your order, you're supporting a young startup and becoming part of our growing TCG universe. 🚀

Fast shipping
As soon as you order, your package will be shipped directly from us – lovingly packaged and climate-neutrally shipped with DHL GoGreen.
Your order will usually arrive within 1-3 working days.

Environmentally conscious packaging
Our products arrive safely packaged and as environmentally friendly as possible. We use recyclable cardboard packaging, avoid unnecessary plastic, and ship climate-neutrally with DHL GoGreen.























