Further research revealed that the ability of the doll's Shield of Darkness to withstand the Black Fog Demon's heavy strike is due not only to its impressive defensive power but also because the "Unlight Domain" deployed by the Shield of Darkness considerably buffered the attack of the Black Fog Demon.
The Unlight Domain has a strong effect of "slowing, weakening, and dulling." The so-called "unlight" means no speed of light, no sharpness of light, no strength of light. When its domain is opened, all existence is affected by the "unlight," becoming weak and slow, including the Black Fog Demon.
However, both the "domain" and the "soul field" are secondary existences, with the "field" being more powerful.
Logically, an existence like the Black Fog Demon should at most be affected by the "field," and should not be affected by the "domain" and the "soul field," at least not significantly.
