Muscle Shriek (G-BT01/036EN) [Generation Stride]

[AUTO](VC) 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 (2)] When this unit attacks a vanguard, you may pay the cost. If you do, choose up to two of your rear-guards, [Stand] them, and those units get [Power]+2000 until end of turn. [AUTO]:[Counter Blast (1) & Soul Blast (1)] When this unit is placed on (VC), you may pay the cost. If you do, choose one of your grade 1 or less rear-guards, choose one of your opponent's rear-guards with equal or less [Power] than that unit's [Power], and retire it.