Ok, I know this probably isn't implemented into the game but I performed my own personal ritual for good luck with killing creatures.
How to perform the ritual:
Equiptment:
Blade of Woe (Or a Daedric Sword)
Legendary Full Ebony Armour
Briar Heart
Daedra Heart
Average Size health potion
Frostbite Poison
Method:
1. Go to a river, preferably near a waterfall with rocks.
2. Throw your Blade of Woe / Daedric Sword into the river, making sure it travels downstream
3. Now put the chestplate of the ebony armour onto a rock
4. Place a Briar Heart to the left of the Ebony Chestplate
5. Place a Daedra Heart to the right of the chestplate
6. Drown yourself, losing a small portion of health (Preferably one quarter)
7. Take the health potion
8. Posion a weapon with the Frostbite Poison
9. Obtain the gift of Charity
10. *Optional* Pick up the chestplate but LEAVE THE HEARTS.
11. Do not pick the blade back up, leave it in the water.
12.Enjoy good luck after this ritual
Conclusion
This probably doesn't work, but hey? It spends about 20 Minutes of your time..
Also, I have seen better luck! I also never take off my Ebony Chestplate.
Good luck