Gnomish Harm Prevention Belt

{Gnomish Harm Prevention Belt will allow you to absorb up to 500 damage from any source. If it backfires you will be banished for 20 seconds.

Source
Gnomish Harm Prevention Belt can be created by engineers who have specialized in Gnome Engineering and have a minimum skill of 215.

The recipe for this item can be learned from a Gnome Engineering trainer.

Background
This thick belt has a heavy iron tube as its core. The user can't simply snap this on; he must step through the hoop and then fasten the device in place with leather straps. The belt contains a variety of reactive chemicals and mechanical devices that detect incoming physical and energy attacks, and instantly respond to shunt them aside.