I am going to teach you how to distinguish between different kinds of power, Phoebios said.
Demon Sword Spirits and Demonized Fallen Heroes haunt the Vilefiend Spire to the east. There is a basic difference between the power of those two demon spirits.
The Demon Sword Spirits' power stems from Magic Sword Shards, and the Demonized Fallen Heroes' power comes from Mystic Souls.
Get them back for me.