Damn I finally found it. Somehow that one wasnt as obvious as most others to me.
It was a crystal in the hat guy area. And not the most obvious one there, the other. Should have been obvious to find but when you are always on the lookout for fake walls, you tend to ovrlook other stuff...
for time 1h 26m which could have been faster if I didnt look for crystals for quite a while at the end. But wouldnt be any fast time either wa sicne I never aiemd for it in the first place.
