Thunder Under Needlespire
From the magazine: "The monster you're sent out after is so dangerous that even mind flayers fear it. And the illithids want your help!"
Earthquakes hit the area around Needlespire mountain, affecting both dwarven and deep gnome villages, and the local mining industry. Deep gnome expeditions discover an illithid outpost!
This adventure includes roleplaying encounters with both deep gnomes and illithid in their quest for the true cause of the earthquakes. The creature causing the earthquakes is a draknor which has sent its huge tentacles into the earth seeking magma to fuel its growth.
Pgs. 38-60