Update 12/21/2018:

New PvP, Gauntlet, Invasion and Fishing events are now available.
All familiars are 200% stronger in this weeks PvP event.
+100% Item Find in World Bosses has been added as a daily bonus for every day this week.
Offerwall bonus has begun! Android and IOS users will receive 2x Gems on all offers for the next 24 hours!!