The Proud Creature was a figure in the Tale of the Seven Proud Sons. He was a demon the parents of the Seven Proud Children had made a pact with, and he was destroyed by the dagger of Valandil. That act allegedly transformed the dagger into the Valankris. Some old inscriptions give the creature the name Geddorath.
Most assumed the Tale a mere myth, but with the revelation that the Valankris had made its way into the hands of the Malachite Hand, it is possible that the rest of the tale is true as well.