But either way as said above Diamond Shield could be fairly strong. The problem is, that this creature is pretty situational, but even with a couple creatures up against you it's really strong. Diamond + 5 opponent creatures = 15 attack..... And many decks go over 5 creatures.
Of course it would be strong with diamond shield. That's what it's made for

But to set up this you need 4

(upped ghost) 6

(diamond shield) and an opponent with many creatures. If all that happens there is the chance your shield is destroyed. OK PA is

too. So 1

. 4HP isn't that much. So your creatures can be destroyed too. There is a counter too in

: hevy armor. That's another

.
4

+ 8

+ 4 cards. And you still aren't sure your creature isn't killed.
It's potentielly strong but I don't think it's OP. What can be done to make it more balanced if you say it's too strong?