Cheongryongdo

The magic-destroying sword Cheongryongdo is one of three legendary dragon blades. As the dagger can only be owned by one owner at a time, Cheongryongdo will electrocute any who touch it other than Iris.

NOTE: in the English release of the manhwa, there are multiple variations of the spelling of "Chonryongdo" (e.g., Chernryongdo) though none reflect the actual Korean spelling, Hepburn Romanisation suggesting instead Cheongryongdo.