Would like to know about it too. But as far i know, when you got aguild you can go to guild base with team.And team leader can enter to time event, to get 2 scrolls and protect them from other player on the way to give them to other npc. Team is with 3 persons, and they fight together. With this u get guild activity points to elvel up you guild.But dont know how exactly how it work cause today it didnt worked for my team, probaly the event ended or some bug...