Sephiroth is one of the most badass villains in gaming history, and one of the main reasons for this more-than-worthy title is his extremely large katana, Masamune. This emblematic weapon, which appears in other installments of the franchise brandishing different designs, is a 7-8 foot super-katana, at least as long as Sephiroth is tall.
Masamune is tuly unique and we would love to see it in other games. There are plenty of katanas in RPGs, but not nearly as long as Sephiroth's iconic weapon. We definitely need more disproportionate swords in gaming.