Greven il-Vec, Haunted

Fear (This creature cannot be blocked except by artifact creatures and/or black creatures.)
When Greven il-Vec, Haunted enters the battlefield, sacrifice 1 land.
Sacrifice 2 swamps: draw 3 cards.
Whenever a basic land you control is put into
the graveyard from play, search your library
for an instant card and put it in your hand.