From time to time I see a MASSIVE (at least 800 range diameter) blue octagon (or hexagon, it's gone too quick to be sure) on champions. It's gone in about 2-3 seconds everytime, too quickly for me to screenshot it by the time I realize it's there. I'll keep trying though.
Further details: It's not a perfect shape, it has runes or mini shapes within it, some look like triangles, almost as if its several shape's outlines stacked on top of each other at different axi.
Whats with this thing? Has anyone else seen it?