Soul perception

There are multiple potions that grant the soul perception ability, with the dirge moth chrysalises potion being the most widespread one, although it is only available in 23-year-long intervals. 

Some people are simply born with soul perception, most likely as a result of a hidden bloodline like empathy is. This innate ability is also sometimes called "ghost eyes"^[1].

Some people, after almost dying, unlock the ability by accident. This is something that can't be reliably replicated or counted on, since it's not really known how it works.^[1]

Most necromancers use this method. It involves forging a temporary soul bond with a person and experimenting with their soul, effectively torturing and killing them. This is a very painful and slow process for the victim, and it requires the caster to have highly flexible morals. This method is cheap and easy to set up, so it is the most attractive method to necromancers. Zorian and Zach refused to use that method under any circumstances. ^[1]

The imperial ring grants soul perception, but only while it is worn by the user. Thus, this method is not permanent, unlike all of the above.^[2]

• Kael Tverinov^[3]
• Alanic Zosk^[4]
• Silverlake
• Sudomir Kandrei^[1]
• Kylae Kuosi ^[5]
• Zorian Kazinski (acquired it mid-story^[6])
• Quatach-Ichl
• Red Robe

• High priest of the sulrothum tribe residing in the Ziggurat of the Sun
• Zach Noveda