What does the Crimson Mantle’s aging block do?

[Peelee]

I mean, if it required more precision than they could muster out of a group of volunteers, i'd say that definitively disproves the myth regardless of whether its technically possible to light a fire on something with polished... it was bronze, right?

Oh, I'm fairly sure he never did that, but slapping a few mirrors around isn't mythbusting. It's hardly even quality presentation.

ETA: Also, Archimedes' mirror is not a hill I'm going to die on, it was just an example. They can be very accurate and in-depth, but they can also be fast and sloppy. The primary goal was entertainment, not accuracy.