Dark

Dark elemental powers enables its host to generate, move, and/or manipulate darkness itself. This is usually symbolized by the black, tainted veins and the glowing black hair of the user.

Users
Josephine "Jo" Peters: daughter of Sam Peters, Sr. and Hannah Peters; got dark powers from her uncle dying and being cursed with his powers as a result

Sam Peters, Jr.: second-youngest son of Sam Peters, Sr. and Hannah Peters; inherited dark powers from his father's side of the family combined with light powers

Joshua "Josh" Peters: eldest son of Sam Peters, Sr. and Hannah Peters; inherited dark powers from his uncle, Nathan.

Nathan Peters: youngest son of Daisy and Paul Peters and younger brother of Sam Peters, Sr.; got dark powers from an incident from a machine his father built that burst a fuse

Incantations
Shadow Incantation: this enchantment allows the user to transform in a shadow. Its words go as follows:

Shadows of the night,

Growing stronger than you came.

Sink into my blood 

And let fear reign.