The Spellbind Eyes of the Faery Human Race were their biggest secret, and not everyone possessed them. Only those with a certain blood density are born with them.
However, being born with Spellbind Eyes doesn't mean they can use them at will. Although they might be able to use some of their connate prowess, to utilize them fully, they need the secret knowledge of the Faery Human Race that they guide with the utmost security.
Only those with privilege, like the members of the Edgar Clan or the candidates of the Holy Children, can gain some level of access to their knowledge, while those from the branch families must pledge their absolute loyalty to the Edgar Clan before they are given the chance to learn the mysteries of Spellbind Eyes.
However, no matter their status, they don't get the entire knowledge. Instead, it was divided into parts, and then they had to prove themselves to the temple to earn the rest of it.
