Thruster Vixen

:When this unit is placed on other than by a unit card's ability, [retire a rear-guard with a different card name from this unit], search your deck or drop for up to one card with the same card name as this unit, call it to , and if you searched the deck, shuffle the deck. :At the beginning of your battle phase, if you have a grade 3 or greater vanguard with "Skyruler" in its card name, [discard the top card of the deck], and until end of your opponent's next turn, this unit gets +5000/+5000. If your drop has fifteen or more cards, it also gets +5000/+5000.