
The Dark One is a term of describing a person who is influenced by dark magic. He has extreme and dangerous abilities and powers in which he can control everyone and everything, though his only limit is the possession of the Excalibur sword, or sometimes known as the Dagger, which is in fact the broken half of the sword. Origined from the television series Once Upon a Time, the magic of the Dark One transfers its dark power through multiple users, with Rumpelstiltskin, Emma Swan and Killian Jones, being among the possessors of the title.
Rumpelstiltskin's version of the Dark One is mainly used in the villain tournaments.
In the second Disney Vs Anime Villains War, it is revealed that Chernabog bears the title of Dark One.