Intimidating Mutant, Darkface

/:When placed, [discard a card from your hand], choose one of your opponent's rear-guards without any Cradle markers, and put a Cradle marker on it. (That unit loses its original abilities, has its reduced by its original , cannot boost nor intercept, and when it is retired, you search your deck for up to one card with the same grade as that unit, reveal it and put it into your hand, and shuffle your deck) /:When it attacks a vanguard, 1, choose one of your opponent's rear-guards with a Cradle marker, retire it, and this unit gets +5000 until end of that battle for each grade of the chosen unit.