This game screws you over way too often. Once you get to the higher leveled enemies they pull bs attacks, and during my incursion the boss revived all his health as soon as he was about to die AFTER I SPENT 52 CREDITS TO REVIVE MY PEOPLE. We lost the damn incursion. The crystals almost always give the the worst characters, I have never once got anything other than a 2 star hero from the blue and yellow crystal, and I've opened a lot of them.