Necron

Necron was a powerful Skeletal Being who could incinerate flesh.

Making a deal with the Sea Hag
Sometime during 2002, he came to the Sea Hag's lair and planned to take her life force to feed on. However, she convinced him to spare her life, and in exchange she would find him a mermaid, an immortal creature.

She made a deal with the mermaid, Miley, that she would give her legs and one month so she could find love and if she did not, the Sea Hag would take her immortality and give it to Necron.

Six Months Later
Six months later, Necron returned to the Sea Hag to kill her, but, once again, she convinced him not to, planning to kill a newly-turned mermaid for her immortality.

Death
However, Paige kills her. Necron, after finding this out, turned his hunt toward Phoebe, and captured Piper to make a trade. The Charmed Ones ultimately killed him after having drained Phoebe of her immortality.

Necron also had two crow familiars which he used to help him track down Phoebe, which is very much like how Tuatha used her snake to find her wand.

Necron

 * Necron is a Skeletal Being who hovers between Life
 * and Death. This demon has the power to incinerate
 * any living creature to feed on its life force. These stolen
 * life forces sustain Necron through centuries of unlife,
 * though he requires an unending supply of living essence
 * to keep him from decaying further.
 * See Skeletal Beings for more information.

To Vanquish Necron

 * Power of Three Spell


 * Tide of evil washed ashore,
 * Bring its darkness evermore,
 * With all our strength we fight this fate,
 * Make this evil obliterate!