A good card even in a mixed deck it would be worth a 2/2 as land counts as a perminent and so does the card itself (assuming only one blue land and two non blue lands).Put four of these as your only blue creatures in a Blue Deck and had only four land and no other blue perminents each would be worth 8/8 minimum. I know blue is all about control but you still need to finish off the oponent with some damage. Also if it was a green card and not blue it would be overpowerful.