Magnum Assault

(This ability is active if you have one or more face up G units in total on your or G zone): 1At the end of the battle that this unit attacked a vanguard, if this unit was boosted ([Boost]) during that battle, you may pay the cost. If you do, this unit, and this unit gets +2000 until end of turn. (Even if you do not pay the cost, this ability cannot be used for the rest of that turn)