his cutie mark is a metro map

Almost!

Formally, the mark is representation of multiple timelines. The black one is main line. The green is a timeline that diverges from the main one. The orange is an AU that does its own thing. And the blue is some timey-wimey multiuniversal bullshit.

But I was definitely influenced by subway maps when I first came up with it. Public transportation and infrastructure and maps are other interests of mine.

Overall, the mark stands for a talent in world-building and designing. A bit broad, but I think it fits me alright. ‘ -’