The day of the demon invasion and the looming war against them have come to pass and people are now gathering outside the castle to witness Queen Tanya's speech. After all, if not for her leadership and her tireless work to keep Sandurk intact, they wouldn't be celebrating right now.
I received Queen Tanya's exclusive quest about King Arthur's weapons though only Excalibur is confirmed to be the one mentioned in this quest. However, having a single quest involving the owner of multiple heroic weapons is already good. If I am extremely lucky and thorough on this quest, who knows I might get the chance to obtain another clue to find either the Rhongomyniad or the Carnwhennan.
Receiving the quest this early means I already maxed out Queen Tanya's level of friendship. If I have not maxed it out, why would she give me the info about the heroic weapons which are considered as one of the end game weapons, unique to any player who obtains them?