I think so. So you use the glyph as the focus, instead of say a staff and it guides the spell into the shape you need it to take when you put your magic through it?

[A much more simplistic way to look at it, probably, but he dimly remembers Malcolm mentioning glyphs and how they can be used to focus. He'd skimmed over it though, telling Adalwolfe that they should be more worried about what he can cast quickly to protect their family and get them to safety as opposed to spending too much time on finesse work that may or may not help. He'd listened then without argument because father knew best, but he's older now and knows that perhaps that isn't the truth of it.]

Can a spell like that paralyze multiple targets if the glyph is big enough? Or would that take too much mana?