7. Mehrune's Razor
What it does: Dagger's enchantment has a 3% chance of instantly killing any opponent.
Where to find it: Museum in Dawnstar
How to get it: The Mythic Dawn museum in Dawnstar is missing an exhibit piece - Mehrunes' Razor, which has been split into three pieces that you must find and put back together. The easiest two pieces to find are located in different dungeons, but the third is owned by a man in Morthal, who must be persuaded to part with it using gold or murder. Your choice. With all three pieces in hand, travel to Mehrunes Dagon's shrine with Silus to fix the dagger, where Mehrunes will tell you to kill Silus in return for the repair. Do so and loot the dagger, and you'll be faced with an optional fight with two Daedras. If you choose to fight, you'll be rewarded with a key to Mehrunes' shrine for more loot.