So there’s this sword, and it’s pretty bad, or bad-ass depending on your stance, and it’s called the Soul Edge. Why is this sword bad(ass), I don’t hear you cry? Because wielding it gives the owner an incredibly large amount of power, but slowly steals their soul in the process. Fair deal, right?
To counter this, many years before SoulCalibur V, the Soul Calibur was crafted; a sword to directly oppose the Soul Edge, and together they would destroy each other’s power for a certain amount of time, until someone seeks out the Soul Edge once again.