Dark Guardian

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Dark Guardians are a type of Skeleton. They have greater soul value (1200) and they appear in Fort Farragut.

One can be found guarding the Dark Brotherhood Sanctuary in Cheydinhal, which is non-hostile and he is counted as a member of the Dark Brotherhood. Killing him will result in expulsion from the Dark Brotherhood, unless you kill him in (or after) the Dark Brotherhood quest The Purification. Note: After the Purification, you can kill the Dark Guardian without being expelled. The Dark Guardian respawns after being killed after an indeterminate amount of time (a day or more), and can be killed multiple times without ramifications. He always has a leveled weapon, and a leveled shield, making him a decent source of money.