Nathaniel, Revived Summit

Once during a turn, you may have a creature
spell you cast cost {1} less to cast for each land
that has been put into the graveyard this turn.
When Nathaniel, Revived Summit deals combat
damage to a player, you may sacrifice any
number of lands. If you do, return a creature
card from your graveyard with converted mana
cost equal to the number of lands you sacrificed
to your hand.
You may play an additional land card from your graveyard each turn.