Marvel Contest of Champions

Game Cheats:

Premium Hero Crystals:
You can purchase Premium Hero crystals with Units, the game's premium currency. Premium Hero crystals will always result in a two-star Champion at the minimum.

Purple Crystal:
During quests you will be able to collect purple crystals which have a variety of rewards, the most common being ISO-8.

Daily Crystal:
When you log in daily you will receive a free crystal that will reward you with a two-star or better Champion.