Weapons.
There are so many weapons in every media, heck, some are only made inside that media.
Books can treat magic like weapons. Anime has people turning into weapons. And of course something that was gifted to us recently ... A sexual item can become a weapon, for example, the dildo bat from Saints Row.
Creativity these days is a wonderful thing.
Yet, I choose blades, not just any blade, but the sword.
Yes, I know, it could be one of the most plain choices here, but I have intrigue with this weapon. Sure, one of the more earliest forms of weapon, but I just like how people thought "slim, long metal = pointy/sharp stick of death". Then from there, we have stabbed, slashed, and 'scratched' [https://youtu.be/zKhEw7nD9C4?t=1m26s] other soft human beings.
Plus, it has given many legends, heroes, and others grand weapons, which give birth to tales. I mean, without the legend of King Arthur and Excalibur, we wouldn't have such best waifus characters like Saber from Fate/Stay Night. Of course, this comes with the bloody but glorious battles we've heard of. I mean, if you have seen real steel hit together in real life, it is very ... Primal, I guess, it reaches in you and pulls out the rawest of all instincts.
Without them, we wouldn't have Berserk, and without Berserk, humanity wouldn't have a single person to focus all of their hate upon.
I mean, for fuck sake Griffith is such a-
*ahem*
I mean, yeah, that is my point. Plus this [http://vignette1.wikia.nocookie.net/berserk/images/7/76/DragonslayerWield.jpg/revision/latest?cb=20121224151805] is awesome.
So yeah, swords, a origin for many good things. Yet looking up, well, there are many other awesome weapons.