Assault Formation would essentially make it a 9/5 (it would
deal damage equal to it's toughness, 9, and it's toughness is basically cut in half due to it's own triggered ability, 9 divided by 2 would be 4.5, rounded up to 5).
It does have haste, so with
Assault Formation out, if you could give it double strike you could be swinging for 18 in the air on t4....possibly t3 if you have some ramp going.
Additionally, with it's 9 toughness it is out of the range of
Languish and the other -x/-x spells currently in Standard (that I can think of anyway).
So it's not a bad card per se, you'd just have to include it in the right build IMO.