Liches are undead necromancers which have embraced the power of Lichdom, placing their soul in an object called a 'Phylactery', which is usually a jar or a chest. They are selfish and power-hungry, destroying all in their searches for souls to repair the Phylactery. Extremely intelligent and powerful, a commonly held myth is that if the Phylactery is destroyed the lich will also be destroyed. A weaker variant of lich is the nether lich, which appear as spectral in comparison to a normal lich.
Lichdom is very hard to accomplish, taking large amounts of time and sacrifices, as the souls of innocents are needed to achieve lichdom, higher amounts of pain from the unwilling victims produce a purer and stronger form of lich. It also requires a powerful magical relic, as it acts as a casting focus for 'Urelu's Loathsome Coercion', the spell used to take the souls from the victims, the higher a relic's power is, the more painful the soul tearing will be. Due to the amount of effort to accomplish lichdom, it's very rare for a traveller to encounter one, as most will stay in tombs studying obsessively.
- For game-specific information, see the Arena, Daggerfall, Morrowind, Tribunal, Oblivion, Oblivion Mobile, and ESO articles.