Originally posted by SamZEDwell, he did kill every hero on an alternate earth recently - so that much at least is fact.
Currently Trigon is MANY times weaker than he used to be. But he said that even in current state he's powerful enough to destroy every hero on earth, earth itself and the entire universe. So I vote - Trigon.
Originally posted by Knowsbleed33
He invented Chaos Magic didn't he?
Chthon catalogued the evil spells of the demonic Elder Gods of Earth in the Darkhold. He is the original author of the Darkhold, an indestructible collection of evil mystical knowledge and spells that he intended to serve as the medium through which he could return to Earth. The Darkhold can apparently change its form, since Chthon created it millions of years before the rise of humanity, to whom it appeared as a set of scrolls with human writing upon them. Most people who use the Darkhold's spells fall under Chthon's mental control as a result.
Dormammu frequently gets magical spells from Chthon, as well as many other dark magic users.