Since some of you are playing, here's a few quick tips that I wish I knew going into it:
-Try to work your way through events to better cards. It starts to snowball when you have some good ones.
-When you have good ones don't fuse them until you have both cards fully maxed (boost and mastery)
-In this event, save your RDS bars. In a few days Magneto will enrage, use them then and you'll get 3x the rewards
Also, you can trade, sell or buy cards here for in game currency or $: