Board Thread:Game Discussions/@comment-24003134-20131121054653/@comment-23825938-20131121175643

I used it once. But I only used it for a boss that was actually there that week so it costed only 11 gems. It gives you 2 of the materials needed for you to craft your amor, but it does NOT add any progress to the tier-rewards. I used it when I could not beat the level43 back then, so I could still get the 2 materials to craft the plusversion.