Geralf's Champion

Geralf's Champion enters the battlefield tapped.
{u}{b}: Put the top card of your library into your graveyard. If the card was a zombie, put a +1/+1 counter on Geralf's Champion.
{u}{b}, Sacrifice a zombie: Put a +1/+1 counter on Geralf's Champion.
"That is one magnificent skaab!"
-Stitcher Geralf