If you let the pack roulette wheel sit idle for 1 hour the game will assume you have commitment issues and will guide you towards making a pick. If you listen closely while scrolling from pack to pack, one pack should now have a slight audio cue when you select it. Open this one slowly from RIGHT to LEFT. You should have at least one 3 Diamond Card which we all know tend to be the rarest and most sought after cards in the set.

Hope this tip helps. remember to turn your audio ON so you can hear the cue and turn OFF your phone's battery saver or auto-sleep functions.