As soon as Kahn took out the blood-bind contracts & the blood-oath token, the mighty and godly figures were slightly surprised.
Normally, it was them who demanded for these measures to the people who came to make deals with them and that too with terms and conditions which only favored their side.
But here, it was Kahn deciding the terms and conditions of the contract and didn't hesitate twice before he directly took out these contracts and the blood-oath token.
Usually, just their word was enough to make sure the deal was considered done but in this case, it was the young and a beginner businessman making them sign the dealings and even using the artifact to facilitate the deal. As if their word & reputation had no meaning to them and the young semi-saint rank human did not have an ounce of respect towards their background or prestige.
Reference Art for Ceril Human Form given in chapter comments. Check it out.