Moprh {1}{B}{B} (You may cast this card face-down as a 2/2 creature for {3}. Turn it face-up any time for its morph cost.)

When Gravekeeper's Ambusher is flipped face up, you may return a card in target opponent's graveyard to the bottom of their library. This ability cannot be countered by Necrovalley.

When Gravekeeper's Ambusher dies after being flipped face up, you may return target card with Necrovalley in its name from your graveyard to your hand. This ability cannot be countered by Necrovalley.