Challenge Conquerors: Silver - Guild Edition

Challenge Conquerors: Silver - Guild Edition is a guild dungeons & raids achievement earned by completing every Pandaria Challenge Mode dungeon with a rating of Silver or better while in a guild group.

Series

 * 1) Challenge Conquerors - Guild Edition
 * 2) Challenge Conquerors: Bronze - Guild Edition
 * 3) Challenge Conquerors: Silver - Guild Edition
 * 4) Challenge Conquerors: Gold - Guild Edition