I imagine it's a difference of concentration of shadow anima and direction of its effects. I mean, we were able to let Zaros into the threshold of our soul without seeming to cause him any harm, and that was while he was in a weakened state.
Clearly it doesn't have to (immediately) erase souls given that ours was able to be mixed with it, and it similarly doesn't negate the effects of all anima on us as we are still affected by mortal magics. Heck, even Xau-Tak who is almost certainly using shadow anima mutates and twists life rather than annihilating it.
The indiscriminate destruction effect of shadow anima seems like it is just the most basic effect of the substance while it is possible to manipulate it to ends other than the complete and total destruction of regular anima.
Edit: Also note that the world guardian can fight a more powerful black stone dragon in the Dragonkin Laboratory with up to 2 other adventurers who, lore-wise, don't have any protection from shadow anima and can still approach and fight said dragon. So the aura doesn't seem to necessarily be imminently lethal unless intentionally directed to that end.
31-Jul-2020 14:37:35
- Last edited on
31-Jul-2020 15:05:45
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Hguoh