One person: Starting with the Snow Drinking Blade

At the foot of the Leshan Giant Buddha, I stumbled into the Lingyun Cave. The moment my eyes met those of the Fire Qilin, a searing crimson light engulfed me. When I awoke, I was holding the Snow Drinking Blade, hot Qilin blood flowing through my veins, and the swordplay of the forty-meter-long blade echoing in my mind.
I thought I had gotten the Long Aotian script.
Until I saw a scruffy young girl hack down a thousand-year-old zombie with a kitchen knife, a shameless guy try to swindle me with a golden light spell, and a white-bearded old man ask me, "Kid, why is your qi so hot, but your knife is so cold?"
Oh, so this is "Under One Person".
That's alright then—I'll perform "Invincible in All Directions" to liven things up, and see who really is this "one person".