How can I activate the Teamwork Effect?

Normally, heroes will start at LV1 but with the teamwork effect on, all your heroes will become LV40, LV60, and so on. There are only two requirements to activate the teamwork effect:

* Your top 5 characters reach the required teamwork level

* Pay the required amount of Magic Crystals.

Once you have paid the amount of magic crystals, the minimum level of all heroes under your command will increase. This effect will only affect the heroes with levels below your teamwork effect level. Furthermore, any resources you’ve invested on heroes below the teamwork level will be refunded.