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The lcl lake in Evangelion is the same thing. They're trying to create a huge being where all humans are to be absorbed by it - this is Moloch. The story makes complete sense when viewed from this perspective.

One time when I was 6 or so, another kid showed me a He-man comic and pointed to one frame, saying "that is the lake of blood". I knew nothing of He-man lore but this image stayed with me ever since. I could never understand its meaning until now.