Direful Doll, Serenella

[AUTO]:When this unit is rode upon by "Direful Doll, Griselda", look at the top seven cards of your deck, choose up to two cards with "Direful Doll" in their card names from among them, put them into soul, and shuffle the deck. [AUTO](RC):When this unit attacks or boosts, if you have a grade 3 or greater vanguard with "Direful Doll" in its card name, until end of that battle, you may have this unit get [Power] +5000. If you do, at the end of that battle, bind this unit.