Update: Rosaline event is now live in-game!
Lilith Games have announced a special event for the official AFK Arena Facebook page.
If the page receives 350k likes by 28/07/2019, then every player will be gifted an elite copy of the new upcoming hero Rosaline!
Well.. it's due to begin on the 24th, but the page has already reached that within 5 hours. Enjoy your free Rosaline! (the hero isn't released yet though).
Might be worth considering liking the page anyway, if you haven't already, as it always has official news for the game posted by Lilith.