This quest is not available in game.
Complete the quests in Ashran.
Your champions return weary and wounded. They bear a banner which, when placed in your hands, gives you a sense of foreboding, but also a surge of battle lust. They report to you of an island named Ashran, where heroes are constantly waging a war. The tides push back and forth, each side feinting and thrusting, always trying to gain the upper hand. Ashran needs your help, will you answer the call?