The Worldbreakers are a faction of black dragonkin found in the Smoldering Perch in the Waking Shores. Originally known as the "Warders of the Earth" and "Children of the Earth", they have been converted by Cygenoth into believing the prophecies of the Twilight's Hammer; hoping to bring about the Hour of Twilight.[1] They are trying to reform Morchok in the Slagmire.
According to Ingot, most of the Worldbreakers are simply misguided. After Cygenoth's death, who was revealed to actually be a Twilight's Hammer ogre in disguise, several of his cohorts continued his ruse. These are Doventhal the Chosen and Vyzos the Prophet; who are also ogres in disguise. Rather than accept they have been lied to, the Worldbreakers repeatedly keep electing new leaders; only to kill them if the Hour of Twilight is not brought about in a timely manner as promised.
The Worldbreakers have a whelp in their ranks known as Scalding. It is unknown where this whelp came from, and whether or not he is actually a whelp or another ogre in disguise. He is the only actual black dragon in the faction; as Doventhal the Chosen is one of the aforementioned disguised ogres.