Fel

Fel
Abilities	Death Coil, Eye of Kilrogg, Fel Domination, Life Tap
Color	Sickly Green
Source	Sargeras — The God of Fel and Flame
Traits	Destructive

Fel is Light or Shadow as energy cannot be created. Fel is a substance that passed for blood for the evil immortals known as demons. Everything touched by the fel emanates a strange green glow. It is evil, but at the same time very powerful. Fel magic is what disorder manifests as. Disorder, along with the forces of order, governs the cosmic systems of the physical universe. Disorder manifests as fel magic. This highly destructive energy is a brutal and addictive magic fueled by drawing life from living beings. The Burning Legion, a demonic army created by the dark titan Sargeras to scour all creation, moves world to world decimating everything with devastating fel magic. Fel magic is a destructive form of magic often used by members of the Burning Legion. Its use frequently results in corruption that manifests in a physical transformation, such as a change to an individual's eyes or skin color. All demons of the Burning Legion carry the taint of fel magic within their very blood, allowing them to spread greater evil.

Despite chaotic or demonic fel power coming from demons and ultimately the Twisting Nether or netherworld (the netherworld can be defined as the underworld of the dead), fel — to Blizzard Entertainment — is not necromantic death energy.

Death (Maximum Disorder)

Fel can be conflated with death if fel is looked at as a cosmological force that may be feared but ultimately is necessary to the function of the world. Death is maximum disorder and not only does disorder manifest as fel magic, but plagues Azeroth, who was uniquely susceptible to fel death as a titan. Fel magics link beings to the Twisting Nether or the netherworld, which is the underworld of the dead.

God of Fel and Flame

The fallen titan Sargeras is the God of Fel and Flame. When Sargeras broke Mardum, the subsequent explosion of fel magic was powerful beyond even what the fallen titan had imagined. Violent energies enveloped Sargeras, surging through his veins and searing his very soul. His eyes burst in gouts of emerald fire. Fel volcanoes ignited across his once-noble form, splitting his skin apart and revealing an endless furnace of blistering hate.

Magical Practitioners

Warlocks

Warlocks are channelers of forbidden powers or magical practitioners that seek to understand darker, fel-based magics, including destructive spells and summon demons. They channel demonic fel powers mostly to damn life. They can, however, use fel powers to heal through demonic fel healthstones or raise the dead through demonic fel soulstones. Affliction warlocks are masters of shadow-touched powers, but unlike shadow priests—deadliest when pushed to the brink of insanity—these warlocks delight in using fel forces to cause intense pain and suffering in others. The destruction warlock is well-versed in discharging a dizzying array of shadow, fel, fire, and chaos magics upon opponents that rattle souls and conflagrate bodies. Warlocks are felraisers — fel can be raised from the Twisting Nether. There are warlocks in the northwest of Talador draining the life of the land, preparing to summon a demon lord. Fel is chaotic energy. Warlocks can convert life into fel, draining the victim as a source of power.

Origins (Characteristics)

Fel is the Light and Shadow, the technically divine magic of Sargeras — the God of Fel and Flame. It can be conflated with death. It was conceived by a fel First One, presumably to be related to the endless cycle of death and life. It can thus be stated that fel relates to death and is necromantic magic in that way. When regarding to the RPG, fel energy is the ultimate manifestation of the demonic arcane on Azeroth. It not only corrupts lives into demons, but decays or pushes things to a state of entropic decay and eventual oblivion. It can ultimately be used to do anything and/or everything its channelers set their minds to — it is speculated to be the darker, truer form of arcane magic. Fel energy cannot exist without arcane energy, just as the Shadow cannot exist without the Light. Fel presumably follows the dichotomy of the Light and Shadow because chaos combines all schools. Fel magic is... strange. Almost slippery like an oil, and it burns long and hot.

Fel leaves psychic traces and is a psychic energy. By applying the principles of arcane magic it is fairly trivial to control primitive fel energies.

The Emerald Nightmare

When the druid Malfurion morphed the warlock Xavius into a tree, the tree became demonically fel-corrupted. Fandral would graft branches of this demonic fel tree into the World-Trees. The warlock Yogg-Saron had used the trees planted by Fandral as a doorway into the Emerald Dream — a doorway through which the other Old Gods could grasp the ethereal domain as well. Small seeds of corruption were spread throughout Ysera’s realm. In time, these seeds polluted the dreamways. This marked the beginning of what would become known as the Emerald Nightmare, a realm of death. The Emerald Nightmare is from “the fel energies of a thousand demons”. It is said that the Emerald Dream is a place of paradise — what Azeroth would have been had it not been touched by mortals. Corruption, however, is endemic to existence and the Emerald Dream is no exception.