Battle Siren, Orthia (R)

[AUTO](RC)[1/Turn] Generation Break 1 (This ability is active if you have one or more face up G units in total on your (VC) or G zone):[Counter Blast (1) & Soul Blast (1)] At the end of the battle that this unit boosted a rear-guard, you may pay the cost. If you do, choose one of the boosted units during that battle, [Stand] it, and that unit gets [Power]-5000 until end of turn. (Even if you do not pay the cost, this ability cannot be used for the rest of that turn.)
[CONT](VC/RC/GC):Resist (This unit cannot be chosen by the effects of your opponent's cards)