Marvel Super War Crystal functions:

1. The only use of crystals at present is to purchase the Dark Star Spirit Ball gift pack in the mall - props, the price is 75 crystals each. The Dark Star Spirit Ball gift pack contains 1 gold coin and 1 Dark Star Spirit Ball, and the daily purchase limit is 50.

2. You can go to the collection hall - Dark Star Spirit Ball, and use this prop to draw a lottery. If you draw a total of 40 Dark Fragments, you can exchange them for the hero Thanos. There is also a chance that you will draw purple-quality skins of other heroes. The fearless stone you draw can be used to polish medals for heroes. You need to go to the backpack to select the props for use.

3. Achievement medals are even more useless. They are just achievement titles for viewing. In actual combat, they have no special effects or attribute bonuses.

The above is all about what the Marvel Super War Crystal is used for. I hope it will be helpful to you!