I uploaded this video for those who are curious about what happens if you do not have any boons when you face Hades. Here you go.
1. Pick as few boons as possible
2. Sell as much boons as possible
3. Get lucky on the Styx Rooms
4. ?
5. Profit
#Hades
source
As stated by the fates: The son of the god of the dead shall die within 1.57 seconds to a battle with his father.