The grindiest game I have played. Takes years to collect a good roster and even longer to equipt them. Expect to always fall short on what you need for weeks at a time and hit very hard walls. When you do get enough to summon a high star hero, it will be a some foot soldier. It is FTP hell, honestly if it did not have Marvel characters i would never play it. Update: Game has got worse, used to get a ftp character, now you can't without having to spend or wait months, nothing got better.