The point of this card is mildly confusing to me.
You have to have 7 - 8

to play it, but you're essentially only
using 4

...
Its kind of under and overpowered...
Under-powered in that 7

for 6 attack is to much, but 4

for 6 attack is overpowered.
[EDIT]: Okay, wait... stupid me, that Actually means that it IS balanced. This card is screwing with my mind... >.>