Board Thread:Off Topic/@comment-26397825-20160528034745/@comment-25936766-20160530224018

MiniDaggers wrote: @Someone: As mentioned in general limitations the effect disappears as soon as the glyph is stepped off of. The glyph bases its predictions on prior body movement and assumptions from the user on the most likely next movements of the target. The more the target moves on top of the glyph the better the feel for how it is likely to move next. The margin of error is ridiculous large in the intial period of use and if they stand on it for less than a second the prediction would be worthless. .....I think making a normal prediction without any special abilities would grant mostly the same result then. Because seriously, only a moron would stay on a Glyph created by it's enemy, regardless of how damage-less it is.

And I doubt any Grimm will stay on it for long either, unless your OC somehow has a way to paralyze them or something, in which case a prediction Semblance isn't as necesary.