Mass Gravesite

When Mass Gravesite enters the battlefield, exile
up to two creature cards from your graveyard.
Mass Gravesite enters the battlefield with two dig counters on it.
{t}: Remove a dig counter from Mass Grave
{t}, {3}{b}: Create a token that’s a copy of target
card exiled by Memorial Foundation except it’s
a black zombie. It loses all other colors and types. Activate this ability if there are no dig counters
on Mass Gravesite and only on your turn.