Aha! A simple Dispel Magic.
Heh. I really like that idea!
Mind you, it seems that a Caster Level is lacking for the object in question... (and, indeed, have you ever seen an encounter with an animated object sans caster which has one?)
Cheers!
Aha! A simple Dispel Magic.
Actually, it's in the core book. Find the description of hardness there, and go down a paragraph or two. By core rules, animated objects (though not constructs in general) are immune to critical hits.
That's pretty much the same exact text from 3.5. I wonder if it was missed in Pathfinder's crit expansion.
In this case, the best plan is to hit it HARDER!
(Mind you, 'things going wrong' probably involve grab attacks...)
Just a quick question; was the adventure designed with the specific requirement that this cage should die? If there's something in it, can't they pick the lock?
Spiritual weapon doesn't deal energy damage, so it's not subject to the hardness or half damage those have to deal with.