Time to start another story, obviously.
Present tense is:
Past tense is:
Since you mentioned it, I think the serial comma is:
PS: I moved from outlining the GEB (an eternal golden braid) descent-into-hell story into writing actual prose for it. So yes, I carried out my threat to start another story. I love writing Ethan's point of view. Oh, I am going to make Giles suffer in this one. Yay.