Answer:
It's what light turns into in the night
What is it that no man ever saw, which never was, but always will be?
What is always on its way but never arrives?
It is a popular afterlife destination where you want to send people when you're mad at them.
What is this Mexican dish consisting of a tortilla rolled around a filling, typically of beans or ground or shredded beef?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.