"I would recommend against using your sword, unless you're fireproof," Elara says after a few moments of concentration. With her index finger she traces a few lines of the glyph in the air, expression thoughtful. "Mmm...mmhmm. Yeah, this will explode if you break it. It'll also slow you down significantly first, so you'll have more trouble avoiding it. It hasn't gone off yet," she continues, lowering her finger. "I'd say the explosion would be...about twenty feet, at least in our direction, judging by the angle of that curve. It's a fairly common one, and I doubt they went with something obscure when this does the job well enough."