This game is 100% pay to win. Firstly, max heros is limited. Once you hit this limit you can either buy microtransactions to upgrade your vip rank, or use the gems you aquire to but 5 slots. Which is basically nothing. Secondly, heros cannot be disposed of. So if you have low tier heros, you're stuck with them until you spend enough money to maybe be able to upgrade a hero. This has officially stopped my gameplay. I am unable to continue because of this fact. So don't play if you don't buy