I'm pretty sure they're only unlocked while playing the towers. I always go to klassic towers and then the endless tower since it's only 1 round to win. I usually use Jade since her fatalities are pretty quick.

Yes, online counts too.

So basically if you don’t play 24/7 I will take month before you can unlock head. I still haven’t and I’m still stuck with Cetrion and Shinnok amulets. It’s soooo annoying

I have all the heads, but didn't really get any of the skins I wanted with them. Just sayin'... don't bank on the heads giving you amazing rewards or anything - it's just like opening another Kahn chest. I wouldn't even stress on trying to get those, just let them happen passively while grinding for other stuff and they'll eventually all start popping up around the same time when you're not expecting it.

Yes but I need the cetrion head to unlock the kytin puzzle. Other wise I can’t go anywhere

I gotcha. Even when you solve that puzzle though, it opens up a small room of chests. It doesn't grant access to a whole new expansive area or anything.

Oh really? So I missed a door to progress in the Krypt then ???? because I m stuck and don’t know where to go lol

I was just referring to the room that opens when you solve the Kytin puzzle.

Yeah I'm at the point where I think I've seen everything in the Krypt and am just dumping koins into the shrine to unlock whatever is left.