Capítulo 430: 7.11.3 The Crow Storm.

Even with the backing of a god, nothing can be done if one lacks personal strength to inspire people.

Or strength to scare your opponents.

An overpowering strength that will make your opponent think twice before going against you, which eventually puts them in a passive, and then slowly the choice they have left is either to join the one holding power or die out. 

That's the kind of strength the Bloodcrow possessed. 

Depending on the part of the body the crow is summoned from, they would possess a different talent. 

For Lucius, his was the eye, making it so that his crow was capable of illusion. Although it was a low-level illusion capable of only fooling those on the same level and below, and easily identifiable by mages of strong mentality or Illusion mages. But in general, the illusion created by the Bloodcrow was enough to fool Amir, who looked like a fool attacking wildly at the air without ever noticing an issue.