The Elder Scrolls: V: Skyrim:
Soap, by M7.
Now you can be clean with your own bars of Soap!
You need: Troll Fat, Salt Pile, and Snowberries to make it in a Cooking Pot.
What it does: increases Magicka by 100 pts for 3600 seconds and Bows do more damage by 990% (instant kills on most targets) for 4+ hours, and cures all diseases.