Cosmic Hero, Grandsub (R)

[AUTO](RC)T1@GB@1(This ability is active if you have one or more face up G units in total on your (VC) or G zone):When this unit's [Power] is increased due to an effect from one of your cards, if this unit's [Power] is 13000 or greater, choose one of your vanguards, until end of turn, it gets [Power] +4000, and [AUTO]VC:When this unit's attack hits a vanguard, your opponent chooses one of his or her rearguards, and retires it.. (It does not activate from increases due to boosting or guarding)