Marvel - War of Heroes phone app
I know there's a lot of other fellow comic nerds here, so anyone else play this? I just pulled a sentinel card worth $200 in real money and wanted to e-brag.
If you like comics it's not a great "game" but it's a really fun time waster and it reminds me of playing with the actual Marvel collector cards as a kid. Just be sure to avoid spending money on card packs. You seem to get better stuff when you aren't even trying.
[Shameless plug warning]
Also, if you go get the app, use my referral code and we'll both get some free stuff: rwy371751