Madolche Puddingcess (UTR) (REDU-EN026) - Return of the Duelist Unlimited

When this card you control is destroyed by your opponent's card (either by battle or by card effect) and sent to your Graveyard: Shuffle this card into your Deck. While you have no monsters in your Graveyard, this card gains 800 ATK and DEF. After damage calculation, when this card battles an opponent's monster: You can target 1 card your opponent controls; destroy that target.