Board Thread:Game Discussion/@comment-11710472-20130721110956/@comment-192.75.101.162-20130722121145

Episode R4 cards quickly become outdated with the never-ending power creep of event bosses, and the non-episode R4s are (1) ridiculously rare to drop from the bridge and (2) too weak to make many players decks anyway. So why not allow cards to be upgraded? Say, for every 7 days you have a card, an upgrade slot opens. Spend 100 Transmetals + 100,000 credits and you get a permanent stat boost on the card (say, 10% to all stats or 20% to one stat). Max of 3 or 4 upgrades per card.

I specifically chose 7 days per upgrade slot so that players cannot upgrade current episode raid cards. The 3x/5x/7x bonuses are enough for them during the event.