30 minutes ago!
Before King Thranduil went to meet with the geniuses, he was looking through the Magic Ball which shows everything that is happening in the Royal Castle.
It was an SS-Rank artifact with the ability to sense and see through everything in a designated place. Any assassin wishing to sneak attack would have already been found before they even got inside the castle.
King Thranduil was with Elara, the person who is able to see the future. She was also someone who has been advising the king of Elven for many decades.
"Elara, do you think that this will work? Can we really protect Elves because of those kids?"
King Thranduil asked. Although she believes in Elara, he couldn't help but feel skepticism when said that their lives and future were in the hands of young kids from different races.