When asked to get the demon's heart for poering the planar sphere, I got far more of them than required. I am wondering if there is any use for them, or should I just dump them. I know that one can be used in Watcher's keep, but you get another one there anyway.
If you have Item Upgrade mod, Keldorn's Hallowed Redeemer can also be upgraded to a +5 weapon with the Demons Heart. I havent seen any use for it otherwise in the original game..