Cavalier of Flame

{1}{r}: Creatures you control get +1/+0 and gain
haste until end of turn.
When Cavalier of Flame enters the battlefield,
discard any number of cards, then draw that
many cards.
When Cavalier of Flame dies, it deals X damage
to each opponent and each planeswalker they
control, where X is the number of land cards in
your graveyard.