schrump, bonepile amasser

Exile a card from your graveyard:
untap this creature (activate this ability only once
each turn)
{t}: exile a card from your graveyard:
add one mana of that cards color identity
{1}{w}{t}: exile a card from your graveyard,
you gain life equil to it's mana value.
{g}{b}{t}: exile a card from your graveyard,
mill 3