So basically just reading magic as it's cast. Useful.

[ Childermass does find himself a touch envious of the skill, just from how Strange talks about it, but overall? He probably doesn't need to look at magic so directly. Too much of it gives him a bad time already, so why tempt worse effects? ]

Though we're both blue... I wonder, does that make our England's magic blue? The Raven King's?

[ There's too small a sample to know for sure but the odds they'd have similarly colored magic seem odd to him. Of course, he also isn't aware his used to be a different color. Not a drastically different color, but still. ]