Some cards are now missing in my collection

I’ve noticed that several of my older legendary cards are missing from my collection. Specifically, the following cards have disappeared:

Alexstrasza the Life-Binder

Malygos the Spellweaver

Ysera, the Dreamer

These cards have been part of my collection for a long time, and I’ve used them frequently in various decks. I’m certain that I have crafted them and I haven’t disenchanted them, and their sudden absence is quite unexpected.

Could this be a bug that has to be addressed?

All of these are cards that got introduced by the core set and got replaced in the latest years at core set rotation times

Malygos got replaced during the latest rotation :
https://bnetcmsus-a.akamaihd.net/cms/content_entry_media/0OEPTFZ0757W1739224158613.jpg

Since the core set is an expansion of cards made temporarily free, once a card leaves the core set, you have to get its original or legacy version to keep playing with it
These 3 being introduced by the core set, you now have to obtain their legacy version by either crafting or randomly getting them from wild packs

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Those cards were part of the Core set at one point, but were removed in a yearly update.

Do you know about the Core set?

It is a large group of cards that Blizzard loans to everyone for free. These cards appear as part of your collection, and you can use them in decks, however you do not own them.

Every year Blizzard updates the Core set, adding some cards and removing others, to keep the set fresh and interesting.

So, this is very likely what happened to those cards in your case. You only had them because they were on loan as part of the Core set. You did not craft them.

However it is a bit odd that you are only now noticing the loss of Alexstrasza the Life-Binder and Ysera the Dreamer, as those cards were removed from Core in last year’s update. Are you sure it is those exact cards, and not the similarly-named cards Alexstrasza and Ysera?

Thank you for your response. Yes I am sure that they are these 3 cards: Alexstrasza the Life-Binder, Malygos the Spellweaver and Ysera, the Dreamer.

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As mentionned earlier, it’s impossible that you crafted Malygos the Spellweaver before the 25th of march 2025
It’s also impossible that you crafted Alexstrasza the life-binder or Ysera the dreamer before the 19th of march 2024
Even though they all exist since march 2021

As has already been said, it is literally impossible that you crafted Malygos the Spellweaver prior to a few weeks ago, because Core cards cannot be crafted.

This issue has been fully explained. Those were Core cards, on loan you to. But a few weeks ago, Blizzard took that loan back.

Case closed.

What is really stupid is that even if you have the bright dust, The Create Option is just greyed out so You cannot even keep it in your collection and just have it as a banned card like the others that are banned even though i still have the cards

you need to craft the legacy version of the card. The core version (which you would have had if it were in one of your old decks) is uncraftable.

You don’t keep the core version but you can craft the wild version of it, there’s nothing preventing that. If the core version is still on your deck, make sure to remove it first