Favorite swords in media?

As the title states, what're some of your favorite fictional swords? Whether they be magical, mundane, ridiculously impractical, whatever.

Berserk has a couple, like Serpico's cool eagle feather sword that cuts things with wind. But the most obvious is the Dragonslayer. A giant, fuck off slab of metal on a stick that was never meant to actually be used. Regardless, Guts manages to do so thanks to his absurd physicality. And as he murdered more and more demons with it, it began to become magical in its own right.

Dragon Quest has the Sword of Kings/Erdrick's Sword. While it maybe a basic bitch move, it's the grand daddy of all cool JRPG swords, and it still does look pretty cool.