Holy items

File: nehushtan.jpg (129KB, 1024x768px) Image search: [Google]

129KB, 1024x768px

So I understand why people want to find something like the Nehushtan (pic) or the Ark of the Covenant, but why do people say that things like the spear of divinity or the Holy Grail have inherent power despite never being given that divine power?
Their entire idea is that they were used or used against Christ himself and thus have power, but if that's the case then how come there isn't people looking for the earth he walked on or the houses he visited? I mean how many "Holy Grails" must Jesus have had used throughout his lifetime?

It's one of those goose chases that really never made much sense to me.