The Deathwish quest is found at your home. Your mother will tell you that an old friend of hers needs help with something.
You can decline the quest and nothing will happen but when you go to help him he says that he wants to die in a fight while he can still wield a sword. If you reject his request and say "I cannot help you", he will reply "Very well." with a sigh. "I will walk in this world until my feet no longer carry, and then lie down, and never rise up again." and nothing else will happen.
If you accept, you will start a fight with the old man. This is one of the few early fights in the game that could be hard enough to actually end your run.
Guaranteed stats :
Old man :
Age : an old age