Blitz Fleet, Uvestei Dragon

[AUTO](RC):When this unit is placed on (RC), choose a grade 3 with "Welstra" in its card name from your ride deck, and you may reveal it. If you revealed a card, or you have a grade 3 or greater vanguard with "Welstra" in its card name, Counter Blast (1), look at the top seven cards of your deck, choose up to one <Tear Dragon> or <Aquaroid> with grade less than or equal to your vanguard and a different card name from this unit from among them, call it to (RC), and shuffle the deck. If you did not call a card, Counter Charge (1). [Keyword]When this unit unmoors, choose one of your opponent's vanguards, and it gets [Power]-5000 until end of turn.