There was a thing in classic WoW where you had a group of warlocks perform a ritual together to summon a doomguard.
I don´t want anything to be exactly the same but a powerful spell that would need a group to perform would be really cool, just sayin.
Also, classhalls. don´t need to say anything more.
I´m just excited for Reborn and looking forward to the future of this game.