Darkness Maiden, Macha

[AUTO]:When this unit is placed on (RC), if you have a vanguard with "Blaster" in its card name, this unit gets [Power] +5000 until end of turn. Then, [COST][Soul-Blast 1 & retire another rear-guard], look at five cards from the top of your deck, choose up to one grade 1 or less unit card from among them, call it to (RC), and shuffle your deck.