Well, i dont make them underpowered because i want people comment on them, i like to keep them somewhat lower because i don't want the game to submit to the powercreep. Or i sometimes just oversee some cards.
Well, you got it that the gem cost was calculated in comparison to summoning scepter. That's an mistake of mine, indeed, because it will summon uncommons either. And i just saw that i made a mistake with the cost-. It should cost bricks instead of recruits.
Edit on the card: Lowered gem cost to 7. Replaced recruit with brick-cost.