Incinerate immunity
I have an issue with the new boss rush only being practical for people who have iceman. This is completely impractical and there are other champs that have this ability such as ghost rider or even others like dormammu and this should be implement into the game so others can have a try at the boss rush. I am stuck on mephisto and will not be able to beat him due to this problem. There is literally only one champ that is immune so create some diversity for god sakes.