Page "Stormbringer" Paragraph 7

Ultimately, Elric's reliance on Stormbringer proves his undoing: after the utter destruction of the Young Kingdoms in the battle of Law and Chaos, just as it seems that the cosmic Balance has been restored, Stormbringer kills Elric, transforms into a humanoid demon, and leaps laughing into the sky, to corrupt the newly-remade world once more.

The sword-spirit says to the dying Elric " I was a thousand times more evil than thou.