Agahnim, Dark Wizard

Evoke {x}{u/b} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters the battlefield.)
When Agahnim, Dark Wizard enters the battlefield, Scry X.
Whenever you draw a card, you may Surveil X. (Look at the top X cards of your library. You may put them into your graveyard.)