Board Thread:Question and Answer/@comment-27722277-20160202173806/@comment-25435121-20160202202203

Personally I keep all my SR until they become HSR once so I get each stage of the art. Once I have the HSR, I medal them off as I get more.

As for Empusa, she was useful back in the day when she was like my 3rd SR and I had no UR, but with all your other cards you have, her skill is useless to you.

HSR High Vampire can be very useful once in GSR form. If you participate in AUBs, keeping her on your team can mean the difference between a 1 turn win and a loss.

Your single event URs and event SRs you may want to hold onto as they may show up again in Witch Gates.

For non-event SRs you can medal them if you really need the space or if you don't care about evolving them for the art. I used to stick mine in collection pages until I could evolve them.

If you are going to use Jewels to expand your deck space (not deck cost) or collection pages, remember that deck space is less expensive per card than collection pages.