I am in the graveyard tombs, at a door that will not allow me to open it...
something about "you sense the danger..." How do I open it Thanks

If you're at a door underground and near a hall filled with Egyptian imagry, you can't open it on your own. You need to go raise enough money to go visit the shadow theives guild leader, without saying more this will lead the way to undead central...

Good luck.

In other non-spoilerish terms, you need to follow the plot.