The reward system is best but theres been too many op warlords to beat up beginners and tehy dont explain to u that u have to have the same warlord as the legion of use those cards and I ended up buying random cards for ages which stunted my play a ton I've been seeing alot of the game being about combos and specifically escape vent tons of op stuff with that and sacrifice and it makes salamanders OP and hard as a beginner to beat and theres lots of them 5 stars