Hi there how offtern do.the elemental chest come around
Some people think it’s random and some think it depends how many times you fill the other chests.
I hit one of each monster and hero a day and get about one elemental a month
It’s both random, and dependent on how frequently you fill the chests. I clear on average 3 chests a day between heroes and monster, and i see an elemental chest about once every 2 weeks. Sometimes i get one after 1 week though, and sometimes it takes 3 weeks before i see one. If you spend gems to speed up your chests, you may see elemental chests more often.