Imbued Shield of Paineel  

 

From what I understand of the history of Paineel and the Hole, in a desperate measure to prevent the minions of the Plane of Underfoot from destroying all of the Erudites, Dartain, a powerful Erudite heretic, and his compatriots flooded the breach (perhaps to prevent fire elementals from crossing the breach?). He used this shield to breath underwater and continue his work to seal the breach in the Living Wall of Stone (the barrier between Norrath and the Plane of Underfoot). He was successful but at a pyrrhic cost; he and all his friends were trapped on the Underfoot side of the breach. All but Dartain were slain by the elementals whose vital essence managed to escape but whose mortal remains were forever lost in the Plane of Underfoot.