Semidaemones

Semidaemones are a type of demonic being which is a human or part human with the soul of a Demon. They are destined to kill the Semideus.

Culture
Among Elklorians Semidaemones are considered mythological and are usually referred to how dragons may be on Earth. However, Semidaemones are less well known than Semidei.

Known Semidei
Angeline is a Semidaemon from the first book of the series.

Another known Semidaemon is Vivian Nimue Fuigna, usually called Vivian or Nimue. She is historically Merlin's enemy.

Powers
Demonic Magic: Semidaemon magic includes dark and light magic and all Semidaemones seem to be wizards of some kind; it is unknown whether nonmagicals can be Semidaemones.

Magic Creation: Semidaemones can "create all manner of curses."

Bilingualism: Semidaemones can understand the Demonic Language

Killing: A Semidaemon can only kill, not resurrect

Immortal Demon Form: Semidaemones can assumably change into a form like an Immortal Demon.

Trivia

 * Semidaemon is a Latin-based made up word based on semideus, but as deus means god, daemon means demon