The game start to be bad. First of all is arena refreshing, I try joining a match but slip out touching refresh using gem by accident and it mess up both lose chance to fight with the team I choose and waste 15 gems for free which really upset me. If you set the confirm bottom for that, it won't be like that. Second the random percentage on crafting look like it not correct as description. I use increase rank charm and rarity charm to craft item 4-5 stars and got the same as no charm.