Diablo Immortal Crests

The first major update to Diablo Immortal is Forgotten Nightmares, an expansive patch with a new dungeon (Silent Monastery), major updates to Warbands (including a guild housing in Castle Cyranger), a new Helliquary raid boss (Izilech the Misshapen), a new event (Scouring the Darkness), as well as another new Battle Pass season, complete with new themed cosmetics. But the most interesting thing in this update is the fact that there's a new way to get Legendary Crests without spending real cash.

Crests are the type of currency a mobile game like Diablo Immortal thrives on -- it's a currency you use order to do something else, but you can't really use it to do anything but that one activity, like a token for a mall carousel.