Calamity was a mysterious dao lord with numerous legends. A consensus was that he came from a secret realm and was certainly a demon. 

To be exact, his original form was a snail. Before becoming a dao lord, he took advantage of this and used his shell as a weapon versed in both offense and defense.

The strongest weapon had a hard time scratching this shell, let alone breaking it. Because of this, ever since his debut, he rarely suffered an injury.

Of course, possessing one of the toughest things in existence only played one part. His own power was just as impressive.

One snail, one shell, unbeatable....