Did someone say [Thunderlord's, Blessed Blade of the Windseeker]?

Aurelion Sol: I did hear someone say [Thunderlord's, Blessed Blade of the Windseeker]! Annie: What is this [Thunderlord's, Blessed Blade of the Windseeker]? Heimerdinger: You don't know what [Thunderlord's, Blessed Blade of the Windseeker] is??? Anivia: Fukin noob doesn't know what [Thunderlord's, Blessed Blade of the Windseeker] is.

(Upvote if you get the reference here)