Board Thread:Game Discussion/@comment-10324144-20130620185755/@comment-11098119-20130620210151

Medals give you a very small chance at Super Rare and Ultra Rare cards. It is my opinion that you do one of the following based on what SR and UR cards you would want:

If you want a chance at UR and SR from this episode, open them while this space bridge is open. Remember the x3/5/10 bonus is only good thru the end of the episode, so I only recommend this if you have half an episode MTM set, or one of your favorite characters is an episode card.

If you want a small chance at cards with a x3/5/10 bonus for the full duration of the next episode, cash in medals as soon as the new episode space bridge opens. Should you get lucky and get an episode SR or UR, I would personally open all the medals I possibly can during that same episode and hope to find the other half of the set to MTM.

If you don't care about possibly pulling the episode cards, you can cash them in once the event closes. You can still get regular super rares (some of which aren't entirely bad). The biggest advantage to cashing in medals outside the event is that you are not wasting event time using the space bridge and leveling cards.