Just want to share some though about this card so far my favorite from realese 3.63 0SE: Target opposing ally takes X damage, where X is Gemstone Javelin's attack + durability. Gemstone Javelin is destroyed at the end of the turn. This card so amazing and have no class restrictions.
I have lots of decks around this card best fits warriors and hunters . Combo with Helm of Saymeth also can be used of any hero. tested this card in elemantals and priest more board clear . Not tested in wulwens rouges and mages thinking about aramia maybe can work. This card is so meta now can be in any deck if builded well . If someone has nice deck around this card please share it here because i need help