bronze keys

Hello, I am not so new to the game since I have been playing for 2 months, but I have found myself in the situation that there is not such a good way to get silver and bronze keys, with everything and what I have in the game it is already It is very easy for me to get gold keys, but with the...

After the update I tried to improve a character (Fighter X), however the game asks me for bronze keys to improve it (since this is silver), luckily nothing happens, only the appearance of the keys requested by the characters, I hope this message is taken into account to make the characters ask...

Right now if you're in the endgame and want to power up some bronze-level fighters for any reason, you're stuck in this vicious cycle of needing strong bronze fighters in order to win the bronze-only prize fights which give them out... but you can't unlock enough buffs on your bronze fighters to...