This banner was from something they started about 2.5 years into the game… the “PvP all-star” eggs. We didn’t see many of them but I believe this was the first one to kick it off. At the time Delugazar, Penguinator, Cyclozar and Chromera were all among the best things to pick up for PvP and obviously the other two were good for it as well. If I remember correctly, this festival was pretty successful at getting a lot of people these monsters.
To see all the other banners check out the top of this thread