Platform, device version and operating system:
PC/Mobile
Screenshot or image:
What you were expecting to happen, and what actually happened:
I was expecting only Hourglass gems to show up randomly in battles, as part of the ongoing campaign. Ever since the reset, there’s also Cursed gems showing up randomly. If this is supposed to be some Halloween surprise it failed to get announced.
Steps to make it happen again
Play battles.
I saw one too. Maybe they are part of the Halloween event? 
Isn’t the event called curse of the wearwolf? Although given it is a self contained event it not sure anything should be in general play.
I kept seeing them in Vault Key battles, thought I was losing my mind at first.
But… the werewolf is related to Lycanthropy.
Scary thought, I could totally see how this could be made worse.
It’s really odd, but yeah… Nothing in the news channels as to why Cursed gems are randomly appearing either.
Wasnt a week months ago that frozen gems falling down randomly ? Like winter theme
There was a specific news about it iirc
Hello, 
This is not a bug. It is meant to be part of the Halloween event.
Apologies as it seems to have been missed from the blog.
Good morning,
With Halloween over, I find myself with Cursed Gems and very, very few Hourglass Gems!
I must have 15 Cursed Gems for 1 Hourglass Gems in 1 fight!
So there is indeed an error!
