The Hall of the Storm, the Agduvar, the place of magic. The Storm Giants, great in wisdom and mighty in power, have long plied their craft in the storm-broken, lightning-scarred towers on the mountain above the southern pass.

Save for the Agdu-Stein, the Agduvar is the smallest of the Agdu: three mighty towers are all the home that the Storm Giant have. There they keep their leiptre, their bronze trees, growing from the discharge of their thunderbolts, and the record of their lore. 

For Flight and Thunder

The three towers, known to the giants as Invarr, Odü, and Algoü, are their homes and their base of operation. For the Storm Giants are still charged with the duty they were given by the Elder Giants – the regulation of the weather across the western kingdoms. But when they stop to rest, they stop here, in the Agduvar, where they use the lightning runs and the leiptres to rejuvinate before continuing again. 

The Leiptres

In the centre of each of the towers grows a tree unlike anything in the world below: the result of their magic and their ingenuity. Long ago, they planted the enchanted seeds in each which grew the leiptres, the lightning-rod bronze trees, the source of celestivere bronze. When the Storm Giants stay within the walls of the towers, the leiptres siphon off the lightning, using the energy in the same way that ordinary trees drink sunlight. Once, they grew to enormous heights, but now they grow slowly, occasionally pruned by the Fire Giants for use in their forges.