If "In Hand" means only your own hand, than this Card would be, compared with the Black Dragon, who costs only 3 recruits more and deals 60 Damage +reduce enemy recruits by 15, quite weak. You could add "on all players Hands" or you could reduce its costs to 30, which makes it as strong as the red dragon, who deals only 50 damage.
If both players Hands are met, than this card fits to its cost.