Combat Mutilations

Mutilations, even if they are usually not very fun for players, add some character and a certain uniqueness to the characters. If I had to take this aspect into consideration, I think I would go with a rule like this:

From 0 hp, the character falls into unconsciousness. At the end of the fight, see the following table:
0, saving throw vs death, succeeded : survival, failed : death.
-1, saving throw vs death, succeeded : severed finger, failed : death.
-2, saving throw vs death, succeeded : severed foot, failed : death.
-3, saving throw vs death, succeeded : blind eye, failed : death.
-4, saving throw vs death, succeeded : severed hand, failed : death.
-5, saving throw vs death, succeeded : severed leg, failed : death.
-6, saving throw vs death, succeeded : severed arm, failed : death.