Hey, so I wonder should I disenchant for example Ragnaros the Firelord if I have the original card for maximizing dust? If the core cards are yours to keep? I did not do that the last time and now I am thinking if it is something I should do ?
As far as I understand, if you disenchant them, you will still have them because they are core. However, once core rotates, you won't have them anymore
That is correct!
If you don't want to play with rag in wild/classic, go ahead! But that wasn't exactly what you insinuated with your question, so your short answer is NO! You will not gain any dust this way, you'll just be trimming the old collection