Thread:Anon421/@comment-35775709-20180629015621/@comment-25669516-20180702011623

Yep, critical mass being rare is actually a bad thing. Not just because it is quite powerful but also because rare items require more number of card stacks to get upgraded to next level when compared to epic or legendary. At my current perk levels, it requires anything between 18 to 26 card stacks to upgrade a rare perk, which is kinda daunting task tbh xD