Contradictory Instructor, Tusk Master

[AUTO](VC/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)] When this unit attacks a vanguard, you may pay the cost. If you do, choose another of your rear-guards, [Stand] it, it gets [Power]+4000 until end of turn, and at the end of that turn, retire that unit. (Even if you do not pay the cost, this ability cannot be used for the rest of that turn)