In around two weeks they will release a new Hero model for Mobile Minigames. It will cost $20, and you are only allowed to buy 6 per account. This skin will never return and you have only one week to buy it. People who own a limited Skin can play with it, export it or sell it on the auction house for crypton.
It’s going to be one week a limited hero skin and the next week a new limited pet. So each month will have two unique hero models and pets.
They are also considering changing the hero previews: