Morrowind:Mehrunes' Razor

Artifact: Mehrunes' Razor (mehrunes'_razor_unique) (lore page)
Type	Short Blade
Damage Damage
Chop	12−15	Slash	12−15
Thrust	12−17	Ratio	42.5 (75 w/ spell)
Statistics
Health Health	600
		Health Health	600
Speed	2.5
Speed	2.5	Reach	1.0
Weight Weight	6	Value Value	5,000
Enchantment
Charge/Cost = Uses		210/21 = 10

Mehrunes' Razor

The Dark Brotherhood has coveted this ebony dagger for generations. This mythical artifact is capable of slaying any creature instantly. History does not record any bearers of Mehrunes' Razor. However, the Dark Brotherhood was once decimated by a vicious internal power struggle. It is suspected that the Razor was involved. —Yagrum Bagarn, Tamrielic Lore

You find this artifact via a quest for the Daedra Mehrunes Dagon, in his shrine at Yasammidan, just west of the Dwemer Ruins of Arkngthunch-Sturdumz, west of Ald Velothi on the coast north of Gnisis. Mehrunes Dagon will ask you to retrieve the Razor from the Alas Ancestral Tomb, in the center of the Molag Amur mountain range, north of Molag Mar, and south of the Erabenimsun Camp. Find and return the rusty dagger to Mehrunes Dagon who will turn it into the Razor. See the Mehrunes Dagon's Quest for more information.

Notes

• This dagger also appears in Daggerfall, Oblivion (with downloaded content), and Skyrim, though with different abilities.