I was browsing YT, watching some videos and I ran into one that reminded me about a beautiful and magical place in Whispering Forest.
I decided to go visit it again, since there is really enchanting environment while the event with little fey dragons occurs.
To my surprise when I was standing there in amazement again - I noticed there is a nest with eggs on the ground in the middle of the circle! So I went into the middle slowly (I didn't want to disturb the ritual :) and clicked the object. I was very glad to receive Music Roll: Faerie Dragon.
If you haven't been there and wish to see something fascinating, I encourage you to visit this place, you'll find it in Tirisfal Glades, just west of Deathknell. There are some speculations about the real purpose of this place, none of them has been officially confirmed as far as I know.