The Beast's Demon's Soul is a consumable item in Demon's Souls.
Description[]
"the soul of the Demon 'Old One' it radiates with tremendous power …"
Availability[]
Obtained after killing the Maiden in Black if the player choses to kill her.
General Information[]
The Beast's Demon's Soul can be consumed for 200,000 souls, making it the soul that grants the highest amount of souls.