[You have changed the original plot largely. Obtained 30,000 villain points.]
Continuing his conversation with the divine beast, Lucas put aside the matter of making a temporary contract for now. He was against doing anything that he held so little knowledge of.
The divine beast turned angry but calmed down after Lucas said he just needed time to consider.
With just a few questions, Lucas was able to gather a lot of information.
The reason Alevoir is weak in spiritual attack physically was because of the divine beast, who absorbed it continuously.
An individual's spiritual energy can resist foreign spiritual energy passively. It was a piece of knowledge Lucas wasn't aware of.
Having no such protection, the Alevoir was directly impaled by the killing intent.