Meant to post something on this earlier but I didn't want to doublepost. Then the thread died.
Copied straight from notepad:
We don't know why this happens yet, but we know one thing: in Warrens, your body is merely a hollow shell created (and potentially ruined) by your soul. Everything "you" are is in your Soul, and your soul retains its form across class changes, gender swaps, and revivals. Everything else - your body, powers, opinions - is perfectly malleable and irrelevant.
theory: boss rooms absorb killed target's soul charge
source:
A power sought out by evil rulers and corrupt dictators for millenea. One time-wrought eye gives life, another takes it. Total control. Total domination. Total and complete power.
oversoul vs willborn?
theory: oric wants the target dead to harvest energy for the last seraphim so he can use it
theory: oric wants the target dead in spirit duel so willborn ciro/sibling happens and then the soul explodes into the flashy white circles, what's up with those? and those are absorbed by the boss room as soul energy charge for the last seraphim for oric to use to expand and maintain the warrens
http://www.bay12forums.com/smf/index.php?topic=121809.msg4485150#msg4485150theory relating to above: transformation/purging of willborn releases soul charge, which is then devoured by the Last Seraphim
entropy, cain's story was angels wanting to solve it! angels are analogous to kyuubey!
Adventurer enters Warrens. Seraphim rips out soul of adventurer, devours charge. Soul is released, recombining with adventurer. Adventurer is Illborn.
Adventurer enters Warrens. Seraphim rips out soul of adventurer, allocates to binding. Soul is released, not recombining with adventurer. Adventurer is not illborn.
Soul stars accumulate and/or lose charge. Soul stars run out of charge. Soul star becomes Willborn. Willborn devours other souls. Willborn is defeated and explodes. Soul charge is released. This powers the Warrens.
Had more quotes and commentary in other .txt files but can't be bothered to look through my documents library to find them- luckily I stumbled upon the most relevant one anyway.