Contorso is a silly sword and I love it.

[Bad Distraction Carnifex]

Lets me break bosses in 1 turn by spamming free attacks and base attacks for millions and millions of damage.

Plus you look like Zeus calling down lightning with the guaranteed crit/lightning bolts at S rank. Makes for some pretty screen shots and acts as support for everyone else by applying tons of debuffs like Weakness. etc.