Don't be ashamed. Everyone makes mistakes. I was super mad one day and sold a maxed 4* ghost, 4* doom, 4* sparky, and many more. Worst mistake I've ever made in the game. The only thing I took from it is that it gives you about 5 seconds of happiness, and then months of sadness. On that note, just keep on working your 4* roster up, and I would recommend taking Venom up as far as you can.
Comments
I used to sell champs because I was dumb so my roster is super scuffed