Did you ever sell champs for crystal shards?
I never usually sell the champs except when I was close to a 4 star or 5 star. Did for 5 star and got Quake but did for 4 star got a 4 star dupe. Only reason one should never sell champs since you will miss out on the max signature crystals you can get and will hurt your chances to get more crystal shards. I decided to stop since it will hurt in the long run. How about everyone else???