Berserk Dragon DZ-SS15/008R TDR

[AUTO]:If this unit was ridden from hand, this cost disappears. When this unit is placed on (VC) or (RC), if you have a vanguard with a Kai icon, COST [Counter Blast (1) or Soul Blast (2)], and perform one of the following. If your vanguard is grade 3 or greater, this unit gets [Power]+5000 until end of turn. ?Draw a card. ?Choose one of your opponent's rear-guards, and retire it. [CONT](RC):During your turn, if you have a grade 3 or greater vanguard with a Kai icon, this unit gets [Power]+5000. If your opponent's vanguard is grade 3 or greater, it gets [Power]+10000 instead of +5000.