I'm good at engineering and woods, but I haven't worked with steels.

[Light is actually capable of laying traps, but he hadn't thought he would need it on this scale. It wasn't like he had ridiculous amounts of security at home. Still, while he can point out a few security flaws of his own, Tsukikage is an expert in this field, and he hardly complained about deferring to experts; Light hardly planned to be his own doctor, lawyer, and other areas that require expertise.]

I do worry about magic, too. I haven't found anything, but have you heard of magic blocking devices during your time here?