In the cartoon Adventure Time, Finn the Human acquired a sword made of grass. It was highly effective, but he couldn't put it down. The grass wrapped itself around his hand when he tried to do so. The sword turned out to be a trap set by the Grassy Wizard.
But Finn accepted this curse, saying, "You know what? I think I'm cool with that." He was willing to accept that he had a totally awesome blade always literally at hand.
DeviantART member tearatone made this prop version of Finn's sword. It's on sale at Etsy. He doesn't mention a curse, but he also doesn't say that it's not cursed. So be careful.