Cemetery Maniac

When Cemetery Maniac enters the battlefield,
you may draw a card for each land card in your
graveyard, If you do, discard a card for each land
you control.
Gravefall - Whenever a land card is put into your
graveyard from anywhere, if you control fewer
lands then the number of land cards in your graveyard, you may pay {5}{b}, if you do, you win
the game.