Mastery cores are way too unobtainable. There needs to be a change.
I got this game during the event for Spider-Man homecoming when Stark-Enhanced was first introduced. I still have no masteries requiring a carbonadium core. Masteries in this game are overshadowed at first by crystals and the player is severely punished for their miscalculations in that department. Champions like corvus glaive and omega red are fairly useless without certain masteries and the cores are so overpriced I will maybe never see their full potential. Mastery cores need to be severely cheapened or there needs to be some reliable source of them, such as the monthly main or side events because FTP players who make unwise decisions in the early game are punished too much for it.