Golgari Thug

“When Golgari Thug is put into a graveyard from play, put target creature card in your graveyard on top of your library. <br> Dredge 4 <em>(If you would draw a card, instead you may put exactly four cards from the top of your library into your graveyard. If you do, return this card from your graveyard to your hand. Otherwise, draw a card.)</em>”