(OOC - Thanks for the tip, Sorrow, and apologies for tardiness...been that kind of week.

)
Thorn squints at the bars for a moment and draws her pale hand back away.
"Good news and bad news. The good news is that this probably is a way in. The bad news is that you can tell that because they didn't just leave it locked. I can't tell what this'll do exactly...but I can bet it'll be very unpleasant, and might make enough noise to raise the alarm."
She looks up at the others, still hunkered down by the grate. "I can try to deactivate the glyphs without setting thm off. Dicey, and I can't promise success, but I can try. Or, if one of you mages can dispel or interrupt magic, then we're in business, and no chance of setting it off."
With a flourish, she produces a few twisted, hooked bits of metal. "If we're not dispelling, and you want me to take a go, you may want to step back a bit."