To be honest I think balanceing this is gonna be a real *****. As $$$man said this + wyrm = big fast damage at cheap cheap cost. The buff in the attack verison of heavy/plate armor is a good idea. Tho this is kinda out of charater for air. Which is about light and fast. For the frist thing with this being "heavy" weaponry I think that any creature equiped with it should lose airborne. The cost should be equal to the buff at the least. Lets face it attack always cost more than defence. Not only in this game but in almost every card game out there. Maybe not much more but still a little. In a combo deck with
(E)Wyrm + Heavy Weaponry + Heavy Weaponry= 15 base + dive =30 damage + Twin Universe + Twin Universe = 90 in 1 turn for 9
12
(as the card stands now). Sorry but to me that is way to cheap for a kill or almost kill shot.