Ghorion was once one of the Three Troll Kings of the Cloudsteeth Mountains.  Undeath has only made him crueler, and much, much more powerful.

They were formidable even before they learned how to use weapons.

Nahactl, the Wanderer

The Trollshaw Staff is roughly six feet tall, though if the bends in the wood were pulled out straight, the staff would easily be eight or nine feet tall. As it is, it is twisted as a troll itself.