Exor

"Halt! Who goes there? A trespasser! This castle now belongs to us, the "Smithy Gang". It's our first step towards taking over this world! And if it weren't for nosey characters like YOU... We'd practically OWN this world! So let's see you deal with THIS!"

- Exor

Exor is a high-ranking member of the Smithy Gang and a major antagonist and boss in Super Mario RPG: Legend of the Seven Stars. Exor is a giant, anthropomorphic sword that is actually composed of four parts: the Left Eye, the Right Eye, the Mouth (which is inexplicably translated ), and the skull-shaped pommel (named Exor) that controls the entire body. Exor is used as an inter-dimensional gateway between Mario's dimension, home of the Mushroom Kingdom, and Smithy's dimension, where Smithy's Factory is located.

The image of Exor impaling Bowser's Keep is one of the primary images used to represent the game. Aside from the world map and Vista Hill, it is on the title screen, the front of the American box art, and the back of the Japanese box art.

History
Exor, on his descent to Bowser's Keep, shatters the Star Road, breaking off seven Star Pieces, thus eliminating the power of wishes from the world. The giant sword crashes into Bowser's Keep, sending Mario, Bowser, and Toadstool (who were battling in the castle) flying to other regions of the world. The keep is occupied by the Smithy Gang, and is used as Smithy's base of operations in Mario's world.

Mario returns to Bowser's Keep in an attempt to find Princess Toadstool, only to meet Exor. Exor claims the keep in the name of the Smithy Gang and destroys the bridge linking Bowser's Keep to the rest of the world, requiring Mario to find another way in.

Eventually, after collecting six Star Pieces, Mario returns to Bowser's Keep via a bus driver from Nimbus Land. After defeating Boomer, Mario and his party are brought to the roof of the castle, where they engage Exor. In battle, the pommel of the sword (actually called Exor) must be defeated in order to win, but cannot be damaged until at least one eye has been disabled, which in a couple of turns will enable itself again, protecting the pommel completely once again. Following his defeat, Exor inhales the party, transporting them to Smithy's dimension.

After Smithy is defeated, Exor disappears entirely.

Trivia

 * In a television commercial promoting the American release of the game, this character was erroneously referred to as "Smithy the Sword", probably also suggesting that he was the main antagonist of the game.
 * Exor is the only Super Mario RPG: Legend of the Seven Stars boss (aside from the Yaridovich clones) that is not immune to Geno Whirl's ability to deal 9999 damage if executed properly.
 * Exor's name may refer to, the sword from the story of King Arthur.
 * Exor is one of only four bosses where the heroes leave the screen without actually posing when the victory screen comes up, the others being the Axem Rangers/Blade, Boomer, and Knife Guy/Grate Guy.
 * In the Nintendo Puzzle Collection version of Yoshi's Cookie, on the world map, a sword that resembles Exor is seen sticking out of Bowser's Castle.

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