If they are both in Legacy and Core, you will still have the core version (which can be used only in Wild and Standard). However, next year the Core set will change and you may not be able to use these cards anymore. In short - Yes you can, if you don't care about Classic Mode.
Hello if I dust legacy cards i lose them in classic and wild or in standard too?
yes eventually
If they are both in Legacy and Core, you will still have the core version (which can be used only in Wild and Standard). However, next year the Core set will change and you may not be able to use these cards anymore. In short - Yes you can, if you don't care about Classic Mode.
Thanks for the help <3