Starving Revenant

When you surveil, you may put all the cards you look at back on top of your library, you may put all of those cards into your graveyard, or you may put some of those cards on top and the rest of them into your graveyard.

Except in some unusual cases, the cards you put on top of your library while surveilling will be the cards you draw.

For Starving Revenant's enters-the-battlefield ability, you put cards into your graveyard for surveil (if any) before drawing cards. If there are eight or more permanent cards in your graveyard by the time you draw cards, those draws will cause the descend 8 ability to trigger.