A new teaser has been added to the PBE!
The file names read "They Are Coming" and creates a spiral above the champion. No details yet on who or what "They" are!
Seems to be random and work with any champion (personally confirmed Graves, Rammus, Nautilus, Kassadin, Janna, Malphite) , most commonly seen around 20-25 seconds into the game. It will not happen every game.
More information available here: http://www.surrenderat20.ne...
[Footage taken on the 8/27 PBE Build]