When Gravekeeper's Chief enters the battlefield, you may put target Gravekeeper creature from your graveyard onto the battlefield tapped. This ability cannot be countered by Necrovalley.

Your graveyard gains protection from Necrovalley and spells and abilities you control cannot be countered or lost by Necrovalley while Gravekeeper's Chief is on the field or in the Command Zone.

Necrovalley Background (You can have Necrovalley as a second commander.)