Cursed area (is this possible?)

[Stikye]

I am writing up a section of a campaign I was going to run. In this campaign I am going to make the players grab an object out of a tomb/crypt/something of that sort. However I want to make it a cursed tomb/crypt/something of that sort. I was wondering if it was possible to link an Unhallow spell with bestow curse, so that any item that is taken out of the range of the unhallow spell, puts a curse on the PC's ala bestow curse. It would be time linked, so that the item I want them to grab isn't effected by the curse, say a ghoul ran out and took it back in. But everything else in the tomb that was there when the spell was cast is effected.

So, 2 questions
A. Is this possible?
B. What would be the best way to do this within the rules?

If theres not a way, Im going to put on my DM hat and do it anyway, just want to follow the rules as much as I can.

Thanks for your time and help.

[Evil Lincoln]

Sounds like an unholy mixture of unhallow, contingency, permanency, and bestow curse.

I don't think you need more than that as a GM, because it's a awesome idea; the rule of cool would be the only rule you need here. If you really want you could say it was created and paid-for as a wondrous item.

Slap a really high price tag on it, make the NPC that built it rich (or formerly rich) and call it a day. Spend the time you save not looking up rules writing a really awesome description of the curse, and your players will not mind too much.

[Stikye]

The idea came to me after the group I play in now has repeated been warned not take/loot/etc stuff from random spot a, or b... almost every where we go we get told not to loot it or there will be a terrible curse, and there has yet to be ANY reprecussions from looting the place dry... one of our players actually went out of his way to grab every skeleton in the tomb and throw it in a bag of holding.