Kandarian Demon

The Evil Force, also known as is an evil supernatural entity that was released when Professor Knowby recited passages from the Necronomicon Ex-Mortis are recited and chanted out lous and it is the recurring main antagonist of the Evil Dead series.

All victims of the Evil's possession display some degree of superhuman strength, being able to easily throw full grown human adults across a room with one hand and punch through solid wood, and deadites that are already deceased upon possession display other abilities, as seen in the case of Henrietta, who was able to fly and transform into a snake-headed creature, referred to by the cast and crew of Evil Dead II as "Mr. Pee-Wee Head"; however, living possession victims have shown an ability to levitate. Sunlight is able to drive the evil force away and return those who are possessed back to their original state, as seen in Evil Dead II. In The Evil Dead, the Evil is released by Ash and his friends and subsequently possesses them. In Evil Dead II, the Evil Force is given a physical form, a large demonic tree-like creature with the heads of its victims on the side; also called "Rotten Apple Head". Ash's head is one of the faces embedded in the creature's side, despite the fact that it hasn't killed him; it could be possible that Ash's head was there because he was to be the Evil's next victim until Annie drove the Evil back through time to the year 1300. In Army of Darkness, the Evil is seen briefly, where it chases Ash into a windmill. Its power is later said to be responsible for raising the army of the dead. Most of the Evil's scenes are shown through its point of view. It is somewhat implied that the Evil may be composed of more than one entity, as individual Deadites often refer to themselves as a group rather than a singular. The back of The Evil Dead case even suggests that there is more than one demon. In The Evil Dead, Sam Raimi, using a device that modifies his voice, provided the voice of the Evil Force, in Evil Dead II, the force is voiced by William Preston Robertson, who also voices the laughing inanimate objects.

It is possible that the Evil entered the mirror in both Evil Dead II and Army of Darkness to briefly become his reflection; this would mean that The Evil becomes one with Ash's dark side, and that both manifest into Evil Ash. In Army of Darkness, Wiseman refers to Evil Ash as "The Evil", and a Necronomicon page said that the figure (later revealed to be Ash) was destined to destroy the evil, and at the end of Army of Darkness, Evil Ash is destroyed by Ash.

The Evil Force would be replace by another unseen dark entity known as Shaitan, the main antagonist of the 2013 remake Evil Dead.