Archimonde draws magic symbols on the ground, forming a diagram of the foundations of Dalaran.
Archimonde says (in Eredun):"Let this scar signify the first blow against the mortal world... From this seal shall arise the doom of men... who, in their arrogance thought to wield our fire as their own... Blindly they built their kingdoms upon stolen knowledge and conceit... Now they shall be consumed by very flame they thought to control..."
Archimonde takes a handful of sand and spills some of it, it rises into the shape of Dalaran city. Archimonde destroys the sand figure of the Violet Citadel peak, and the real Violet Citadel peak falls. He destroys the rest of the sand model, razing all of Dalaran into rubble.
Archimonde says (in Eredun):"Let the echoes of doom resound across this wretched world, that all who live may hear them and despair."