Bad drop rate,really hard to get legendary heroes,even epic heroes too.Hard to get red gemstone to summons,stamina refill so slow,auto repeat must buy with real money,event just for whales,pity doesn't share for banner,many bad thing because this developer so greedy and stingy and more thing wanna do high dungeon floor and pass you must use legendary heroes.this game just money money money...not F2P,but P2W game