Suggestion: Lich Taint

They haven't become a lich by any means, but they've been touched by the aspect of lichdom. Lich's being rather territorial, they will be noticed by any others with associations to a lich, and that lich will be curious...the player will be investigated. If there is a reason for them to remain curious, expect an interview and serious questions.

Have you been spying on me?

I'm 53, and I think we started being taught metric in grades 3 and 4. For me, the chart is very accurate.