The Dwemer were well-defended by their fortress at Red Mountain, but Nerevar's cunning drew most of Dumac's armies out into the field and pinned them there, while Nerevar, Dagoth Ur, and a small group of companions could make their way into the Heart Chamber by secret means. There, Nerevar the Chimer King met Dumac the Dwarf King and they both collapsed from grievous wounds and draining magics. With Dumac fallen, and threatened by Dagoth Ur and others, Kagrenac turned his tools upon the Heart, and Nerevar said he saw Kagrenac and all his Dwemer companions at once disappear from the world. In that instant, Dwemer everywhere disappeared without a trace. But Kagrenac's tools remained, and Dagoth Ur seized them, and he carried them to Nerever, saying, "That fool Kagrenac has destroyed his own people with these things. We should destroy them, right away, lest they fall into the wrong hands."