Dark One Dagger Cleaving Spell

Dark One Dagger Cleaving Spell is a spell that allows the caster to cleave the Dark One from the Dark One's Dagger, making the dagger unable to control them and enter the Land Without Magic with their powers. It requires the following ingredients: heart of the person who knew the Dark One when they were still a man/woman and an enhanced Sorcerer's Hat.

It featured on ABC's Once Upon a Time. It first appears in the "Poor Unfortunate Soul" of the Season 4.