Sorry if this has been asked before, I am new to the forums and didn't find the answer to my question in a search. I have a couple unopened Dunwich Legacy Mythos packs. Reading the back I see the Core set (I have) and the Dunwich Legacy deluxe expansion (I don't have) are required. It seems the deluxe expansion is out of print now. Copies are going for inflated prices online. My question is, can I use the Return to the Dunwich Legacy instead? Seems like that option would be much more reasonable if possible. Thanks for any info!