First entry in the forum
Concept is inspired from the Sphinx in Oedipus Rex, only in my version she has a human counterpart and is a machine, with a bit of an art deco angle. In the original story the Sphinx guards the path to Thebes, asking every traveller a riddle and eating everyone who gets it wrong. Eventually Oedipus comes along and gets it right.
Anyway for those who are curious, here's the riddle:
"What goes on four feet in the morning, two feet at noon, and three feet in the evening?"
Looking forward to the other entries.