Breaker Blade

The Breaker Blade is a Hardmode sword. It is the largest sword in the game, and also has the most knockback. It is one of the possible drops from the Wall of Flesh.

Trivia

 * It is the largest sword in the game, and has the longest range. The Blade of Grass follows as the second-largest.
 * This item may be a reference to the Buster Sword wielded by Cloud Strife in the game Final Fantasy VII and related movie Final Fantasy: Advent Children. It is similar in both name and appearance, even having what resemble a pair of "materia" attached, as can be done in the game. The name also brings to mind the "Limit Breaks" from the game, which are super powerful attacks unlocked when a character has taken many hits in combat.
 * Due largely to the teeth on its blade, it also resembles the chainswords of the Warhammer 40,000 universe.