A bloody, crazed, and decapitated female gnomish skull is impaled on the pointy end of the sign at the beginning of the mines, her body cleaved in half left unceremoniously at it's base, a message in blood smeared across the sign's base.

Bring not your corruption to Sanctuary Urdlen follower

A thickly muscled gnome in old rusty chain and a skull-faced helm roars with laughter when he sees the skull, knocking it down and kicking it away with a mighty shout of "BAM!".

Scrawled beneath in the dirt:

"Bow to Urdlen, submit to your lust for blood!"