Zhang Yang had contacted Snow Seeker, One Sword Stroke, and the others. They sent their own powerful Tankers and Healers over to handle the bosses. Zhang Yang did not contact Eternal Flame at all. Instead, he just sent two of his best Tankers, Endless Starlight and Ten Dusk.
Truth to be told, the bosses were not too difficult to handle. The might of these bosses would only become obvious when standing among players. Well, their AoE Skills were extremely powerful. However, once they are kited away from the players, they would not be able to cause much trouble to anyone. Well, their Attack power would be similar or slightly stronger than the Attack power of an Elite Tier monster.