Chronojet Dragon: DZ Booster Set 06: Generation Dragenesis

[CONT]:You can perform [Stride], and cannot ride grade 3 or greater cards without Chronojet in their card names.[CONT]:The original [Power] of your grade 3 cards with Chronojet in their card names become 13000.[CONT]:During your turn, if you have a grade 3 or greater vanguard with Chronojet in its card name, all of your front row units get [Power] +5000 for each face up card in your G zone.[AUTO]:At the beginning of your battle phase, choose up to one of your grade 3 or greater rear-guards, and increase or decrease its grade to 0 until end of turn.