Buy Keystone Hero to complete any Mythic 10+ key, unlock rare achievements and dungeon teleports. Keep in mind that Mythic+ keys offer high-rated gear. Keystone Hero boost helps achieve The War Within Season 2 Feats of Strength for a Mythic score of 2500+. Claim all the rewards and prepare to conquer the desired dungeons only with top teams with our Mythic+ score boost.