^ This is the description of Dragon Gem taken directly from the strategy dex. "If the holder uses a damage-dealing Dragon-type move, then the holder consumes this item and the power of that move is increased by 50%. One-time use." So I believe it only powers up the first one. However it could still have some merit, if used correctly it can give Mence the extra power it needs to break through his biggest counters. I was thinking of trying out a set similar to sub sd terrakion. Something along the lines of Sub/DD/Outrage/Earthquake/ @Dragon Gem with a Adamant nature. Thoughts?