A member of the long-lived strain of mutantkind called the Externals, Krule has had literally a millennium to perfect the arts of savagery and torture he enjoys so much. Because of his fiery personality, he finds himself unable to work his evil schemes slowly over centuries in the manner of his fellow Externals. Krule is more likely to act in a moment of passion, counting on his ferocious mutant strength to see him through to victory! Krule's campaigns have led him into battle against the members of X-Force, particulary Cannonball who, as one of the External High-Lords, he considers to be a blood enemy!