I don't think there is anything about ancient tablets or aliens for Ink. I think he knew SOMETHING was up, God knows what, but that for pre-cautions sake, he put a little bit of EVERYTHING on him. Notice there's a little bit from all kinds of stuff all over him. Various religions, science based drawings, heiroglyphics. I think he took a leap of faith, picked the symbols that meant leader or alpha and went for it.