The Humming Quasar aka Badass giant sword from Atelier Escha and Logy. If I was strong enough to even lift it, I could kills scores of zombies.
Actually, I think I'm screwed because that thing weighs a ton, it's too cumbersome to use indoors and if I try to attack them from outside, I'd be out in the open and proceed to get overrun when I'm too tired. It's heavy too so it's either I flee w/o out and get overwhelmed because there's too many in the way, or I stay but I wouldn't kill all of them before they swarm me
Bad ending, indeed.
Hello. My name is Nino. You killed my family, and you forced me to kill them again. Prepare to die! *BRRRRRNNGGGHHH*