Purchasing Allies (Undo Timer Option)

Hello,

I would love for you to add a undo option for purchasing allies. Possibly a 30 second timer for when the game lags and you purchase the wrong ally.

I spent a decent sum of gold on an ally I didn't want because of a lag spike in the game. I will be stuck with it now because it will never sell for the amount I accidentally paid.

Please inherit this function!