Looks like there's a glitch that allows you to bypass any cost item in the Krypt, including the Heads and door unlockers:
https://www.reddit.com/r/MortalKombat/comments/bj1hra/heard_there_is_a_head_glitch_for_krypt/
I can't believe this still lmao
Do you think there will be any negative consequences for doing this?