The spiders den needs a rework terribly bad, and so do all the dungeon drop chances. The in app purchase economy is way to expensive for next to nothing, and if you really want to hate yourself, go look at how much purple legend crystals you can get for straight up cash. There is a very obvious pay to win element in that the game constantly barrages you with store ads to buy high tier legends, huge power ups, and spell tomes, xp brews, etc. This game just isn't fun for someone unless you pay.