Hellstorm Flume
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Huge towers containing powerful magical energy that were built by the Runelords of the ancient Iskari Empire. The Towers had the ability to harness arcane energy and "fire" it almost like artillery at advancing enemy armies, and some sages believe the towers were actually living beings, carved into stone. These great towers served as border outposts for the empire in its wars against Kalinor and Jandelay, and later were used by various Rune-Lords against one another as the empire fell into civil war and infighting.

Some sages believe that the secrets of these towers was brought over to the Continent of Corwyn in the Late Third Age, and several were built there. But that theory is widely discredited. As of today, none remain, only ruins as a testament to the vast magical powers of the Runelords.