When Chthon possessed the body of Quicksilver, he wove a series of spells at superhuman speed while running around the Earth. Some of his feats include:
caused a river of blood to flood New York City
encased San Francisco in solid amber
made Oklahoma disappear, placed the city of Asgard in an other-dimensional prison
boiled the seas of Atlantis
created and activated volcanoes
overwhelmed Philadelphia with vegetation
incapacitated the New Avengers
melted vibranium ore
summoned swarms of flesh-eating insects in Toronto
reduced the Fantastic Four into television signals
transformed the Young Avengers into stone
summoned an intense snowstorm to strike the Arizona desert