Merge Dragons Purple Star Farming is a technique used to get more Gems in the game.
It’s hard to predict when you will get a Purple Star but here is a list of levels that I play when looking for Purple Stars; in order of preference.
I recommend always completing the quests to earn the stars, each star has a chance of being Purple. Even the Creation, Flourish and Action Quests in camp have a possibility of being a Purple Star! The levels in this list are levels that are easy to complete, earn all 3 starts, don’t take many chalices and they are quick levels to win!