I saw a post about why some cards could not be dusted and i answered that post
I also wanted to assure everyone you will get your dust refund the next balance patch that will happen before worlds.
Here is the dev comment
Card Updates
Dev Comment: The following cards are being adjusted not because of their power levels, but because they disproportionately cause bugs and other gameplay issues, which can be disruptive for players and time consuming to correct. These changes mitigate those problems and help future-proof these cards for updates going forward. These changes are going live with Patch 28.2, but they won’t be eligible for full dust refunds until our upcoming hotfix Patch 28.2.1.